CUSTOM-BUILT AR-15 FUNDAMENTALS EXPLAINED

Self-loading automated pistols may be divided into "blowback" and "locked breech" groups Based on their theory of Procedure. The blowback operating theory is suitable for more compact, decrease-driven calibers, such as .32 ACP and .380 ACP, since the resistance from the recoil spring and mass with the slide are sufficient to retard the opening of y