High-quality, reduced power, action spring helps cure feeding problems caused by excessive bolt "bounce" in fixed-stock rifles configured for 3-shot burst or full-auto modes of fire. Helps shooters fine-tune action cycling for light, target/varmint loads in semi-auto rifles.

SPECS: Tempered, spring steel. Fits .223 cal. AR-15/M16 rifles with fixed A1/A2 rifle stocks. Not for use in adjustable stock carbines.