SPRINCO AR-15 M4/M16 Enhanced 4-Coil Extractor Spring Upgrade Kit

This 4 coil extractor spring Upgrade Kit is designed for AR-15/M16 bolt carrier groups and provides the same spring pressure as OEM springs for use in 18"+ rifles.

This Kit also includes the Mil-Spec extractor insert and a Viton O-ring. Whether you are replacing worn springs or setting some aside for future use, Sprinco springs are the only ones you will ever need.

ADVANTAGES:

• Enhanced 4-Coil springs maintain an extended duty cycle oad of a NEW Mil-Spec spring and is recommended for use in 18"+ barrel lenghts upward for those who retieve their brass for reloading.
• While the XP 5-Coil spring is totally reliable for all 5.56 BBL lengths, it can be aggressive on case rims in 18"+ rifles, and may be too strong for some bolts with extremely tight bolt face tolerances.

FEATURES / INFORMATION:

• 4-Coil Design
• Unaffected by heat up to 750°F
• Optimal for rifles with 18” barrel lenghts upward
• Compatible to AR-15/M16 BCG in all AR-15 calibers
• Includes Mil-Spec extractor insert and a Viton O-ring
• Extreme duty cycles provided while maintaining performance specifications
• Heat Treated, Stress Relieved, and Cryogenic Processed Post Winding
• Impregnation / Plating with Re-Micronized Molybdenum Disulfide Formulation
• Made from Chrome Silicon wire stock
• Plug & play - May easily be the only extractor springs needed for the life of your bolt!!
• Compatible accessories see under this article, accessories.

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General Informations

The Sprinco AR-15 Extractor Springs are made from high quality Chrome Silicon wire stock that has been heat treated, stress relieved, and cryogenically processed to produce long lasting durability.

Standard for US military, recommended by professional gunsmiths.

MADE IN THE USA

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