Smyth Busters: Large-Caliber ARs Need Heavy Hammer Springs? скачать в хорошем качестве

Smyth Busters: Large-Caliber ARs Need Heavy Hammer Springs?

Some folks say an AR-15 chambered in a large caliber such as .350 Legend, .450 Bushmaster, .458 SOCOM, or .50 Beowulf needs a heavier hammer spring to provide enough oomph to properly ignite the primers on those big boomer cartridges. You know how Steve and Caleb roll: they don't accept as fact something that self-proclaimed Internet experts say! Regardless of caliber, most AR-15 cartridges actually use small rifle or large pistol primers. Caleb thinks this "bigger caliber, heavier spring" idea originated with somebody who had an over-gassed gun that wasn't cycling. They added an extra-power hammer spring, which provided enough resistance to overcome the gas-flow problem, and the gun started cycling. Steve's Alternate Theory: somebody had an AR chambered in 7.62x39mm, which ammo tends to have hard primers that the AR-15's small, lightweight firing pin doesn't always ignite reliably. Or their gun was fitted with a light-striking target hammer spring. Caleb embarks on a fascinating tangent about ARs chambered in 7.62x39. Steve goes along for the ride. Bottom line: The size of the cartridge has nothing to do with how much hammer spring force you need. It's about the hardness of the primers on a specific type of ammo. So this myth is BUSTED. You don't need a heavier hammer spring to shoot most larger calibers in an AR-15. A standard Colt or mil-spec AR-15 hammer spring will ignite most primers just fine - unless you're shooting 7.62x39.