AR- Upper / Lower Receiver

  The Adams Arms DI Upper Receiver forged from 7075-T6 aluminum, this complete upper is precision machined to mil-spec M16/M4 specifications and features M4 feed ramps. Match this upper with one of our AR15 lower receivers for a solid and dependable fit. Description:  Mil-Spec Forged 7075-T6 Direct Impingement Upper Receiver Laser engraved Picatinny Rail T-Marks Type III Class II Hard-coat anodized finish M4 Feed Ramps M16/M4 Specifications Auto-Sear Cut  .250 Takedown Pin Holes Engraved Adams Arms Logo Compatible with AR-15/M4/M16 Mil-Spec Lower Receivers  Works with Standard AR15/M16 Components and Magazines Compatible accessories see under this article, accessories MADE IN THE USA

  The Adams Arms DI Upper Receiver forged from 7075-T6 aluminum, this stripped upper is precision machined to mil-spec M16/M4 specifications and features M4 feed ramps. Match this upper with one of our AR15 lower receivers for a solid and dependable fit. Description:  Mil-Spec Forged 7075-T6 Direct Impingement Upper Receiver Laser engraved Picatinny Rail T-Marks Type III Class II Hard-coat anodized finish M4 Feed Ramps M16/M4 Specifications Auto-Sear Cut  .250 Takedown Pin Holes Engraved Adams Arms Logo Compatible with AR-15/M4/M16 Mil-Spec Lower Receivers  Works with Standard AR15/M16 Components and Magazines Compatible accessories see under this article, accessories MADE IN THE USA

  The Adams Arms Gen2 Piston Upper Receiver forged from 7075-T6 aluminum, this complete upper is precision machined to mil-spec M16/M4 specifications and features M4 feed ramps. The Receiver hole has been drill to .180″ eliminating the need for a receiver bushing for our Piston Rods, the Cam Pin channel is cut to a 45 degree angle to eliminate Cam Pin wear. Match this upper with one of our AR15 lower receivers for a solid and dependable fit. Description:  Mil-Spec Forged 7075-T6 Piston Upper Receiver Generation 2 Inside Lifecoat™ Treatment, for improved BCG gliding ability .180″ Piston drive rod hole, no Receiver Bushing needed 45 degree Cam Pin channel  Laser engraved Picatinny Rail T-Marks Type III Class II Hard-coat anodized finish M4 Feed Ramps M16/M4 Specifications Auto-Sear Cut  .250 Takedown Pin Holes Engraved Adams Arms Logo Compatible with AR-15/M4/M16 Mil-Spec Lower Receivers  Works with Standard AR15/M16 Components and Magazines Compatible accessories see under this article, accessories MADE IN THE USA

  High Quality Stripped AR-15 Mil-Spec Lower Receiver for your individual build. Description:  Mil-Spec Forged 7075-T6 Lower Receiver Type III Class II Hard-coat anodized finish Beveled Magwell Open Trigger Guard Machined Chevrons in Front Strap Ambi Safety Selector Engravings Compatible with AR-15 Mil-Spec Upper Receivers  Works with Standard AR15 Components and Magazines Compatible accessories see under this article, accessories MADE IN THE USA

  The AR15 Assembled Upper Receiver comes with the port door and forward assist already installed. Forged from 7075-T6 aluminum, this assembled upper is precision machined to mil- spec M16/M4 specifications and features M4 feedramps. Match this upper with one of our AR15 lower receivers for a solid and dependable fit. Features: M4 Feedramps Auto Sear Cut .250 takedown pin holes Laser engraved T-marks Includes port door and forward assist Compatible to AR-15 MIL-SPEC Lower Receivers Includes: AR15 Assembled Upper Receiver in Anodized Black Port Door and Forward Assist installed Informations:  Barrel Nut Torque - 50 ft-lbs Platform AR15 Material Machined from 7075-T6 forged aluminum Finish Anodized Black Compatibility Works with standard AR15/M16 components Weight(s) 8.35oz Other N/A MADE IN THE USA

  The AR15 Assembled Upper Receiver comes with the port door and forward assist already installed. Forged from 7075-T6 aluminum, this assembled upper is precision machined to mil- spec M16/M4 specifications and features M4 feedramps. Match this upper with one of our AR15 lower receivers for a solid and dependable fit. Features: M4 Feedramps Auto Sear Cut .250 takedown pin holes Laser engraved T-marks Includes port door and forward assist Compatible to AR-15 MIL-SPEC Lower Receivers Includes: AR15 Assembled Upper Receiver in Anodized Black Port Door and Forward Assist installed Platform AR15 Material Machined from 7075-T6 forged aluminum Select Your Finish Magpul FDE Cerakote Compatibility Works with standard AR15/M16 components Weight(s) 8.35oz Other N/A MADE IN THE USA

  Our AR15 Complete Lower Receiver is the perfect base for your custom AR15 rifle. Save when you buy it complete and let our specialist do the installation for you!  Includes:  AR15 Gen 2 Lower Receiver - Anodized Black M4 Stock - Black A2 Grip - Black Mil-spec Lower Parts Kit Carbine Receiver extension AR15 Carbine Buffer and Spring Compatible to AR-15 MIL-SPEC Upper Receivers Platform AR15 Series AR15 Finish Anodized Black Receiver Extension Carbine Compatibility Works with standard AR15 components and magazines Weight(s) 33.15 oz MADE IN THE USA

  Our AR15 Complete Lower Receiver is the perfect base for your custom AR15 rifle. Save when you buy it complete and let our specialist do the installation for you!  Includes:  AR15 Gen 2 Lower Receiver - Anodized Black MAGPUL PRS® Lite Purpose - Built Stock - Black MAGPUL MOE® Grip - Black Mil-Spec Lower Parts Kit Carbine Receiver extension AR15 Carbine Buffer and Spring Compatible to AR-15 MIL-SPEC Upper Receivers Platform AR15 Series AR15 Finish Anodized Black Receiver Extension Carbine Compatibility Works with standard AR15 components and magazines Weight(s) - MADE IN THE USA

  The Aero Precision AR15 Complete Lower Receiver with Magpul SL-K Carbine Stock is the perfect upgrade for your AR build. This complete lower features an AR15 Gen 2 Lower and is upgraded to include an Magpul SL-K Carbine Stock. A drop-in replacement buttstock for AR15/M4 mil-spec carbine buffer tubes, the SL-K. Includes:  AR15 Gen 2 Lower Receiver - Anodized Black MAGPUL SL-K® Carbine - Black MAGPUL MOE® Grip - Black Mil-Spec Lower Parts Kit Carbine Receiver extension AR15 Carbine Buffer and Spring Compatible to AR-15 MIL-SPEC Upper Receivers  Details/Informations:  Finish: Anodized Black MADE IN THE USA

  The Aero Precision AR15 Complete Lower Receiver with Magpul SL-K Carbine Stock is the perfect upgrade for your AR build. This complete lower features an AR15 Gen 2 Lower and is upgraded to include an Magpul SL-K Carbine Stock. A drop-in replacement buttstock for AR15/M4 mil-spec carbine buffer tubes, the SL-K. Includes:  AR15 Gen 2 Lower Receiver - FDE MAGPUL SL-K® Carbine - FDE MAGPUL MOE® Grip - FDE Mil-Spec Lower Parts Kit Carbine Receiver extension AR15 Carbine Buffer and Spring Compatible to AR-15 MIL-SPEC Upper Receivers  Details/Informations:  Finish: Magpul FDE Cerakote MADE IN THE USA

    Our Special Edition: Freedom AR15 Stripped Lower Receiver features a custom engraved American Flag graphic on the magwell of our popular AR15 Gen 2 Lower Receiver. Markings Include Model "FREEDOM" and "4JULY-XXXX" serial number range. Like all of our receivers, this product is machined to mil-spec dimensions and works with standard AR15 components. *Please note - this product is available in limited supply and for a limited time only. INCLUDES: Stripped AR15 Gen 2 Special Edition: Freedom Lower Receiver Why are the stars on the right? This is a commonly asked question with a simple answer - Always Forward, Never Retreat. Per Army Regulations 670-1, the U.S. flag patch is to be worn, right or left shoulder, so that "the star field faces forward, or to the flag's own right. When worn in this manner, the flag is facing to the observer's right, and gives the effect of the flag flying in the breeze as the wearer moves forward." Our AR15 Gen 2 Stripped Lower Receiver is the perfect base for your custom AR15 build. Machined to mil-spec dimensions, our lowers work with standard AR15 components and ensure the highest quality with a correct component interface. GEN 2 IMPROVEMENTS Upper Tension Screw - Allows users to fine tune the fit of the upper and lower receiver through the use of a nylon tipped tensioning set screw inserted in the grip tang of the lower receiver. This provides a tight fit with any standard AR15 upper receiver. Increased Magwell Flare - Allows for easier insertion of magazines and provides a sleeker look. Rear takedown pin detent hole is threaded for a 4-40 set screw INCLUDES: Stripped AR15 Lower Receiver, Gen 2 Nylon tipped tensioning set screw Shipping to FFL Dealer Required Yes Made In America? Yes FFL SOT Shipping Required No Platform AR15 Material Machined from 7075-T6 forged aluminum Select Your Finish Anodized Black Markings Model "Freedom", "Cal Multi", Flag Engraving, 4JULY Serial Number Compatibility Works with standard AR15 components and magazines Weight(s) 8.35oz   MADE IN THE USA

    Our Special Edition: Freedom AR15 Stripped Lower Receiver features a custom engraved American Flag graphic on the magwell of our popular AR15 Gen 2 Lower Receiver. Markings Include Model "FREEDOM" and "4JULY-XXXX" serial number range. Like all of our receivers, this product is machined to mil-spec dimensions and works with standard AR15 components. *Please note - this product is available in limited supply and for a limited time only. INCLUDES: Stripped AR15 Gen 2 Special Edition: Freedom Lower Receiver in FDE Cerakote Why are the stars on the right? This is a commonly asked question with a simple answer - Always Forward, Never Retreat. Per Army Regulations 670-1, the U.S. flag patch is to be worn, right or left shoulder, so that "the star field faces forward, or to the flag's own right. When worn in this manner, the flag is facing to the observer's right, and gives the effect of the flag flying in the breeze as the wearer moves forward." Our AR15 Gen 2 Stripped Lower Receiver is the perfect base for your custom AR15 build. Machined to mil-spec dimensions, our lowers work with standard AR15 components and ensure the highest quality with a correct component interface. GEN 2 IMPROVEMENTS Upper Tension Screw - Allows users to fine tune the fit of the upper and lower receiver through the use of a nylon tipped tensioning set screw inserted in the grip tang of the lower receiver. This provides a tight fit with any standard AR15 upper receiver. Increased Magwell Flare - Allows for easier insertion of magazines and provides a sleeker look. Rear takedown pin detent hole is threaded for a 4-40 set screw INCLUDES: Stripped AR15 Lower Receiver, Gen 2 Nylon tipped tensioning set screw Shipping to FFL Dealer Required Yes Made In America? Yes FFL SOT Shipping Required No Platform AR15 Material Machined from 7075-T6 forged aluminum Select Your Finish FDE Cerakote Markings Model "Freedom", "Cal Multi", Flag Engraving, 4JULY Serial Number Compatibility Works with standard AR15 components and magazines Weight(s) 8.35oz  MADE IN THE USA

    Our AR15 Gen 2 Stripped Lower Receiver is the perfect base for your custom AR15 build. Machined to mil-spec dimensions, our lowers work with standard AR15 components and ensure the highest quality with a correct component interface. GEN 2 IMPROVEMENTS Upper Tension Screw - Allows users to fine tune the fit of the upper and lower receiver through the use of a nylon tipped tensioning set screw inserted in the grip tang of the lower receiver. This provides a tight fit with any standard AR15 upper receiver. Increased Magwell Flare - Allows for easier insertion of magazines and provides a sleeker look. Rear takedown pin detent hole is threaded for a 4-40 set screw INCLUDES: Stripped AR15 Lower Receiver, Gen 2 Nylon tipped tensioning set screw SPECS: Platform AR15 Material Machined from 7075-T6 forged aluminum Select Your Finish Anodized Black Markings "Cal Multi" Compatibility Works with standard AR15 components and magazines Weight(s) 8.35oz Other Rear takedown pin detent hole is threaded for a 4-40 set screw   MADE IN THE USA

    Our AR15 Gen 2 Lower Receiver Set is the perfect base for your custom AR15 build. Machined to mil-spec dimensions, our lowers work with standard AR15 components and ensure the highest quality with a correct component interface. GEN 2 IMPROVEMENTS Upper Tension Screw - Allows users to fine tune the fit of the upper and lower receiver through the use of a nylon tipped tensioning set screw inserted in the grip tang of the lower receiver. This provides a tight fit with any standard AR15 upper receiver. Increased Magwell Flare - Allows for easier insertion of magazines and provides a sleeker look. Rear takedown pin detent hole is threaded for a 4-40 set screw INCLUDES: AR15 Assembled Upper Receiver Anodized Black AR15 Stripped Gen 2 Lower Receiver Anodized Black UPPER RECEIVER FEATURES: Material: Machined from 7075-T6 forged aluminum Finish: Anodized Black M4 Feedramps .250” takedown pin holes Accepts standard AR15/M16 components Includes Port Door and Forward Assist LOWER RECEIVER FEATURES: Material: Machined from 7075-T6 forged aluminum Finish: Anodized Black Markings: "Cal Multi" Works with standard AR15 components and magazines Rear takedown pin detent hole is threaded for a 4-40 set screwMADE IN THE USA SPECS: Platform AR15 Material Machined from 7075-T6 forged aluminum Select Your Finish Magpul™ FDE Cerakote  Markings "Cal Multi" Compatibility Works with standard AR15 components and magazines Weight(s) 15.25oz Other Rear takedown pin detent hole is threaded for a 4-40 set screw

    Our AR15 Gen 2 Lower Receiver Set is the perfect base for your custom AR15 build. Machined to mil-spec dimensions, our lowers work with standard AR15 components and ensure the highest quality with a correct component interface. GEN 2 IMPROVEMENTS Upper Tension Screw - Allows users to fine tune the fit of the upper and lower receiver through the use of a nylon tipped tensioning set screw inserted in the grip tang of the lower receiver. This provides a tight fit with any standard AR15 upper receiver. Increased Magwell Flare - Allows for easier insertion of magazines and provides a sleeker look. Rear takedown pin detent hole is threaded for a 4-40 set screw INCLUDES: AR15 Assembled Upper Receiver in Magpul™ FDE Cerakote AR15 Stripped Gen 2 Lower Receiver in Magpul™ FDE Cerakote UPPER RECEIVER FEATURES: Material: Machined from 7075-T6 forged aluminum Coating: Magpul™ FDE Cerakote finish  M4 Feedramps .250” takedown pin holes Accepts standard AR15/M16 components Includes Port Door and Forward Assist LOWER RECEIVER FEATURES: Material: Machined from 7075-T6 forged aluminum Coating: Magpul™ FDE Cerakote finish Markings: "Cal Multi" Works with standard AR15 components and magazines Rear takedown pin detent hole is threaded for a 4-40 set screw SPECS: Platform AR15 Material Machined from 7075-T6 forged aluminum Select Your Finish Magpul™ FDE Cerakote  Markings "Cal Multi" Compatibility Works with standard AR15 components and magazines Weight(s) 15.25oz Other Rear takedown pin detent hole is threaded for a 4-40 set screw   MADE IN THE USA

  Our AR15 Gen 2 Stripped Lower Receiver is the perfect base for your custom AR15 build. Machined to mil-spec dimensions, our lowers work with standard AR15 components and ensure the highest quality with a correct component interface. Gen 2 Improvements Upper Tension Screw - Allows users to fine tune the fit of the upper and lower receiver through the use of a nylon tipped tensioning set screw inserted in the grip tang of the lower receiver. This provides a tight fit with any standard AR15 upper receiver. Increased Magwell Flare - Allows for easier insertion of magazines and provides a sleeker look. Rear takedown pin detent hole is threaded for a 4-40 set screw Includes: Stripped AR15 Lower Receiver in FDE Cerakote Nylon tipped tensioning set screw Made In America? Yes Platform AR15 Material Machined from 7075-T6 forged aluminum Select Your Finish Magpul FDE Cerakote Markings "Cal Multi" Compatibility Works with standard AR15 components and magazines Weight(s) 8.35oz

  The EPC-9 Lower Receiver delivers billet aesthetics in a forged package for your next pistol caliber build. This custom-designed enhanced forging is machined from 7075-T6 Aluminum and has several functional features, much like the M4E1, to help simplify the assembly process for the at home builder. EPC-9 Lower Receiver Features: Threaded bolt catch pin for easy installation Integrated enlarged trigger guard to remove any risk of breaking off trigger guard tabs, and provide an overall more rugged platform to build on Threaded takedown pin detent recess to allow for the installation of a detent and spring with a single 4-40 set screw Flared magazine well for quick and easy reloads Proprietary components pre-installed from the factory Standard AR15 takedown/pivot pin lug pattern Machined from custom forged 7075-T6 aluminum Compatible with standard frame GLOCK® magazines Platform EPC-9 Select Your Finish Magpul FDE Cerakote Markings "Cal Multi" Weight(s) 12.8 oz MADE IN THE USA

  The Aero Precision EPC-9 receiver set is Precision machined from 2 custom 7075-T6 Aluminum forgings and features a last round bolt hold open. This EPC-9 Receiver Set is compatible with standard frame Glock magazines and accepts 9x19 or .40S&W when using the appropriate bolt carrier, barrel and magazine combination. EPC-9 LOWER RECEIVER FEATURES: Threaded bolt catch pin for easy installation Integrated enlarged trigger guard to remove any risk of breaking off trigger guard tabs, and provide an overall more rugged platform to build on Threaded takedown pin detent recess to allow for the installation of a detent and spring with a single 4-40 set screw Flared magazine well for quick and easy reloads Proprietary components pre-installed from the factory Standard AR15 takedown/pivot pin lug pattern Machined from custom forged 7075-T6 aluminum EPC-9 UPPER RECEIVER FEATURES: Last round bolt hold open mechanism Accepts most AR15 compatible barrel nuts and handguards Dimple above receiver threads provides a visual reference for proper handguard timing when needed Standard AR15 takedown/pivot pin lug pattern Machined from custom forged 7075-T6 aluminum Information: Compatible accessories, see under this article, accessories Made In America? Yes FFL SOT Shipping Required No Platform EPC-9 Select Your Finish Anodized Black Weight(s) 19.8 oz MADE IN THE USA

  The Aero Precision EPC-9 receiver set is Precision machined from 2 custom 7075-T6 Aluminum forgings and features a last round bolt hold open. This EPC-9 Receiver Set is compatible with standard frame Glock magazines and accepts 9x19 or .40S&W when using the appropriate bolt carrier, barrel and magazine combination. EPC-9 LOWER RECEIVER FEATURES: Threaded bolt catch pin for easy installation Integrated enlarged trigger guard to remove any risk of breaking off trigger guard tabs, and provide an overall more rugged platform to build on Threaded takedown pin detent recess to allow for the installation of a detent and spring with a single 4-40 set screw Flared magazine well for quick and easy reloads Proprietary components pre-installed from the factory Standard AR15 takedown/pivot pin lug pattern Machined from custom forged 7075-T6 aluminum Magpul™ FDE Cerakote EPC-9 UPPER RECEIVER FEATURES: Last round bolt hold open mechanism Accepts most AR15 compatible barrel nuts and handguards Dimple above receiver threads provides a visual reference for proper handguard timing when needed Standard AR15 takedown/pivot pin lug pattern Machined from custom forged 7075-T6 aluminum Magpul™ FDE Cerakote Informations: Made In America? Yes FFL SOT Shipping Required No Platform EPC-9 Select Your Finish Magpul™ FDE Cerakote Weight(s) 19.8 oz MADE IN THE USA

  The EPC-9 upper receiver is the perfect addition to any AR9 build. Including a last round bolt hold open mechanism and compatible with most standard AR15 barrel nut and handguard combinations this upper receiver will help take your pistol caliber build to the next level. Features: Last round bolt hold open mechanism Accepts most AR15 compatible barrel nuts and handguards Dimple above threads to allow for proper handguard timing Standard AR15 takedown/pivot pin lug pattern Machined from custom forged 7075-T6 aluminum Laser engraved T-marks Includes: Upper Receiver Pre-installed last round bolt hold open assembly NOTE: The EPC last round bolt hold open is ONLY compatible with appropriate GLOCK® pattern magazines. Platform EPC-9 Select Your Finish Anodized Black Markings "Cal Multi" Weight(s) 7 oz MADE IN THE USA

  The EPC-9 upper receiver is the perfect addition to any AR9 build. Including a last round bolt hold open mechanism and compatible with most standard AR15 barrel nut and handguard combinations this upper receiver will help take your pistol caliber build to the next level. Features: Last round bolt hold open mechanism Accepts most AR15 compatible barrel nuts and handguards Dimple above threads to allow for proper handguard timing Standard AR15 takedown/pivot pin lug pattern Machined from custom forged 7075-T6 aluminum Laser engraved T-marks Includes: Upper Receiver Pre-installed last round bolt hold open assembly NOTE: The EPC last round bolt hold open is ONLY compatible with appropriate GLOCK® pattern magazines. Platform EPC-9 Select Your Finish Magpul FDE Cerakote Markings "Cal Multi" Weight(s) 7 oz   MADE IN THE USA

  The Aero Precision EPC-9 Complete Lower Receiver is the perfect base for your custom AR9 build.  This lower receiver comes without a stock/brace giving the builder flexibility to choose exactly what configuration they want the first time. Included Magpul MOE® grip provides an upgrade in ergonomics from the factory. Compatible to most 9mm Mil-Spec Upper Receiver Manufactures. Includes: EPC-9 Lower Receiver Magpul MOE® Grip Lower Parts Kit Enhanced Mil-Spec Buffer Tube EPC 7.7oz Buffer M5 Carbine Buffer Spring Castle nut/end plate These parts are installed EPC-9 Lower Receiver Features: Threaded bolt catch pin for easy installation Integrated enlarged trigger guard to remove any risk of breaking off trigger guard tabs, and provide an overall more rugged platform to build on Threaded takedown pin detent recess to allow for the installation of a detent and spring with a single 4-40 set screw Flared magazine well for quick and easy reloads Proprietary components pre-installed from the factory Standard AR15 takedown/pivot pin lug pattern Machined from custom forged 7075-T6 aluminum Compatible with standard frame GLOCK® magazines Details/Informations: Finish: Anodized Black Compatible with all Double Stack GLOCK® and aftermarket magazines such as MAGPUL, KCI etc. LRBHO function, depending on the choice of the respective 9mm upper receiver For compatible uppers and accessories, see accessories under this article MADE IN THE USA 

  The Aero Precision EPC-9 Complete Lower Receiver is the perfect base for your custom AR9 build.  This lower receiver comes without a stock/brace giving the builder flexibility to choose exactly what configuration they want the first time. Included Magpul MOE® grip provides an upgrade in ergonomics from the factory. Compatible to most 9mm Mil-Spec Upper Receiver Manufactures. Includes: EPC-9 Lower Receiver Magpul MOE® Grip Lower Parts Kit Enhanced Mil-Spec Buffer Tube EPC 8.1oz Buffer AR15 Carbine Buffer Spring Castle nut/end plate These parts are installed EPC-9 Lower Receiver Features: Threaded bolt catch pin for easy installation Integrated enlarged trigger guard to remove any risk of breaking off trigger guard tabs, and provide an overall more rugged platform to build on Threaded takedown pin detent recess to allow for the installation of a detent and spring with a single 4-40 set screw Flared magazine well for quick and easy reloads Proprietary components pre-installed from the factory Standard AR15 takedown/pivot pin lug pattern Machined from custom forged 7075-T6 aluminum Compatible with standard frame GLOCK® magazines Details/Informations: Finish: Magpul FDE Cerakote Compatible with all Double Stack GLOCK® and aftermarket magazines such as MAGPUL, KCI etc. LRBHO function, depending on the choice of the respective 9mm upper receiver For compatible uppers and accessories, see accessories under this article MADE IN THE USA 

  The Aero Precision EPC-9 Complete Lower Receiver is the perfect base for your custom AR9 build. This complete lower is upgraded to include a A2 Pistol Grip and M4 Carbine Stock. Save when you buy it complete and let our armorers do the installation for you! Compatible to most 9mm Mil-Spec Upper Receiver Manufactures. Includes: EPC-9 Lower Receiver A2 Pistol Grip M4 Stock Lower Parts Kit Enhanced Mil-Spec Buffer Tube EPC 8.1oz Buffer AR15 Carbine Buffer Spring Castle nut/end plate These parts are installed EPC-9 Lower Receiver Features: Threaded bolt catch pin for easy installation Integrated enlarged trigger guard to remove any risk of breaking off trigger guard tabs, and provide an overall more rugged platform to build on Threaded takedown pin detent recess to allow for the installation of a detent and spring with a single 4-40 set screw Flared magazine well for quick and easy reloads Proprietary components pre-installed from the factory Standard AR15 takedown/pivot pin lug pattern Machined from custom forged 7075-T6 aluminum Compatible with standard frame GLOCK Details/Informations: Finish: Anodized Black Compatible with all Double Stack GLOCK® and aftermarket magazines such as MAGPUL, KCI etc. LRBHO function, depending on the choice of the respective 9mm upper receiver For compatible uppers and accessories, see accessories under this article MADE IN THE USA