AR-15 Rifles .50 Beowulf (12.7x42) | High-Power Custom Rifles for Serious Enthusiasts

.50 Beowulf Custom Rifles

Shop .50 Beowulf (12.7x42) AR-15 rifles in complete and custom big-bore configurations at Moriarti Armaments. These .50-caliber AR rifles bring heavy-projectile capability to the familiar AR-15 platform. Browse custom .50 Beowulf rifles in available barrel lengths, handguards, muzzle devices, furniture, colors, and finishes. Compare current 12.7x42 rifles by barrel specifications, gas system, magazine compatibility, included components, and individual features to find the big-bore AR-15 configuration that matches your preferences.

Is .50 Beowulf the same as 12.7x42?

.50 Beowulf and 12.7x42 are commonly associated with the same general cartridge dimensions and AR-15 big-bore category, but the names should not automatically be treated as interchangeable for every firearm or ammunition product. .50 Beowulf is a trademarked cartridge name, while 12.7x42 is commonly used as a generic caliber designation. Always follow the chamber markings and ammunition specifications provided for the individual firearm.