For AR-15 / M4 Carbine:
- Made in Indiana, USA and 100% quality inspected by hand for proper function.
- Constructed from certified USA made chrome silicon spring wire
- Heat treated, stress relieved
- Provides consistent spring pressure for hundreds of thousands of cycles (estimated 750,000+)
- Greater resistance to heat & high stress cyclic rates
- Improves operation, long-lasting performance
- Consistent pressure reduces bolt bounce
- Significantly reduces the perceived "twang" noise which is common during firing
NOTE: This item is for ADJUSTABLE length M4 style buttstocks.
Rifle-length recoil springs for full-sized fixed buttstocks are available HERE.