AR-15 Pistols .50 Beowulf (12.7x42) | Powerful, Custom Firearms for Gun Enthusiasts

.50 Beowulf (12.7x42) AR-15 Pistols

Shop .50 Beowulf (12.7x42) AR-15 pistols in compact big-bore configurations at Moriarti Armaments. These large-bore AR pistols bring the heavy-projectile capability of the .50-caliber platform to a compact AR-15-style firearm. Browse available 12.7x42 pistols by barrel length, handguard, muzzle device, furniture, finish, and included components. Compare current models and specifications, including barrel, gas system, magazine requirements, and lower setup, to select the appropriate .50 Beowulf AR-15 pistol configuration.

What lower setup is recommended for a .50 Beowulf AR-15 pistol?

A .50 Beowulf (12.7x42) AR-15 pistol uses an AR-15-style lower receiver, but the lower should be properly configured for the big-bore cartridge and the specific upper. Moriarti recommends at least a 4.3 oz buffer for its .50 Beowulf configurations, along with the appropriate spring and caliber-compatible magazine. Always verify the complete lower, buffer system, magazine, ammunition, and upper specifications for the individual firearm.