12.7x42 (50 Cal) Barrels | High-Performance Precision Barrels | Moriarti Armaments
12.7x42 (50 Cal) Barrels
Build or upgrade your large-bore AR platform with 12.7x42 (.50 Cal) barrels from Moriarti Armaments. Our selection includes quality AR-15 barrels engineered for 12.7x42 (.50 Cal) builds, offering reliable performance and durability for hunting, recreational shooting, and custom rifle projects. Available in multiple lengths, profiles, and finishes, these barrels are designed for compatibility with most mil-spec AR-15 upper receivers when paired with the appropriate caliber-specific components.
Will a 12.7x42 (.50 Cal) barrel fit my AR-15?
Most 12.7x42 (.50 Cal) barrels are designed for large bore AR-15 upper receivers, but they require a compatible 6.5 grendel bolt and 50 Beowulf magazine for proper operation.
AR-15 12.7x42 18" Parkerized Heavy Barrel | 1:20 Twist | Mid-Length Gas System
Experience top-tier precision and durability with the AR-15 12.7x42 18" barrel. Made from 4150 Chrom..
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AR-15 12.7x42 50B 16" Parkerized Heavy Barrel, 1:20 Twist, Carbine
Elevate your AR-15 build with the 12.7x42 16" heavy barrel, designed for precision, durability, and ..