AR-10 .308 Pistol Upper Assemblies – 7.5" to 13.5" | Compact Mini AR-10

AR-10 .308 Pistol Upper Assemblies – 7.5" to 13.5" | Compact Micro AR-10

Shop .308 7.5–13.5" AR-10 upper assemblies at Moriarti Armaments for compact and short-barrel large-frame configurations. Browse 7.5", 8", 10.5", 12.5", and 13.5" .308 uppers with available M-LOK handguards, barrel profiles, muzzle devices, and custom finishes. These short .308 Winchester configurations prioritize compact overall dimensions while offering multiple options for ARP-10 pistols and other lawful configurations. Compare uppers by barrel length, gas system, twist rate, handguard, muzzle device, receiver pattern, finish, and included components.

How does a short barrel affect .308 Winchester performance?

A short-barrel .308 Winchester generally produces lower muzzle velocity and greater muzzle blast than the same ammunition fired from a longer barrel. The difference becomes increasingly noticeable with very short configurations such as 7.5-inch and 8-inch .308 barrels. Shorter barrels offer a more compact firearm, while longer barrels generally provide greater velocity potential. Actual performance depends on barrel length, ammunition, bullet weight, powder characteristics, muzzle device, and the firearm's overall configuration.