Angstadt Arms 10 oz AR-15 Buffer Kit with Spring 9mm Luger/.40 S&W/.45 ACP Black

The Angstadt Arms 10 oz AR-15 Buffer Kit with Spring for 9mm Luger/.40 S&W/.45 ACP is designed for shooters utilizing dedicated blowback-operated pistol-caliber carbines on the AR-15 platform. This kit is ideal for law enforcement armorers, competitive shooters, and serious civilian operators who require reliable function in their builds.

Engineered specifically to address the unique cycling demands of pistol-caliber AR builds, the 10 oz buffer mass works in harmony with lighter blowback springs. This design helps to control bolt velocity and dwell time, preventing issues such as bolt bounce and carrier tilt that can occur with undersized buffer systems. The included spring complements the buffer mass, ensuring consistent absorption of rearward impulse for enhanced reliability.

Operators using Angstadt Arms complete pistol-caliber uppers or those undertaking retrofit projects will benefit from this buffer kit. It reflects extensive community feedback on reliability and longevity, making it a trusted choice for various ammunition types and barrel lengths common in pistol-caliber builds.