AR-10 Upper Assemblies – .308, 6.5 Creedmoor, 8.6 Blackout & More

AR-10 Pistol & Rifle Uppers by Caliber

AR-10 upper assemblies are complete uppers for large-frame .308-size AR lowers: receiver, barrel, handguard, gas system and muzzle device. Moriarti Armaments builds AR-10 uppers in Miami, from 7.5" pistol uppers to 20" long-range uppers. Most are DPMS compatible.

AR-10 pistol uppers (7.5"–12.5")

Compact large-frame uppers with 7.5", 8", 10.5", 12" and 12.5" barrels, including hybrid, flash can, Claw and Big Gunner builds in .308, 6.5 Creedmoor, 8.6 Blackout and .358 Win.

AR-10 rifle uppers (16"–24")

16" uppers in 8.6 Blackout and 18"–24" match, bull and long-range uppers in 6.5 Creedmoor, .308 Win and .277 SIG Fury, with 15" slim M-LOK rails.

Shop AR-10 uppers by caliber

• .308 Winchester AR-10 uppers
• 6.5 Creedmoor AR-10 uppers
• 8.6 Blackout AR-10 uppers
• .277 SIG Fury / 6.8x51 uppers
• .243 Winchester and .358 Winchester uppers

What is the difference between an AR-10 upper receiver and a complete upper assembly?

An AR-10 upper receiver is the receiver component itself, while a complete AR-10 upper assembly generally combines the receiver with a barrel, handguard, gas system, and muzzle device. Depending on the individual product, the bolt carrier group and charging handle may or may not be included. Because large-frame AR specifications can vary, always verify the receiver pattern, caliber, included components, and compatibility with your lower before purchasing.

Will an AR-10 upper fit an AR-15 lower?

No. AR-10 uppers need a large-frame .308-size lower receiver. Most of our AR-10 uppers are built for DPMS-pattern lowers; check each listing for the receiver pattern.

Which AR-10 caliber should I choose?

.308 Winchester is the most common and widely available. 6.5 Creedmoor is popular for long-range precision. 8.6 Blackout is built for short barrels and suppressors.