AR-10MM 8.5" Slick Side Complete Pistol Upper with BCG & Charging Handle – LRBHO | Moriarti Arms

Uppers

AR-10MM 8.5" Slick Side Pistol Upper with LRBHO, M-LOK Handguard, A2 Flash Hider – Moriarti Arms

The AR-10MM 8.5" Slick Side Complete Upper is a precision-machined, American-made upper designed for pistol-caliber AR builds. This upper assembly features a slick side billet upper receiver and Last Round Bolt Hold Open (LRBHO) functionality, delivering reliable performance for your 10MM AR platform.

Barrel:

• 8.5" 10MM match-grade barrel

• 4150 Chrome Moly Vanadium (CrMoV) steel construction

• Black nitride finish for corrosion resistance

• Twist Rate: 1:16

• Muzzle Threads: 5/8x24

• Includes A2 Flash Hider

Upper Receiver:

• Slick side non-reciprocating billet upper

• 7075-T6 aircraft-grade aluminum

• Hardcoat anodized black (Mil-Spec Type III, Class 2)

• Compatible with Glock and Colt mag lowers (AR-9/AR-40/AR-45)

• Integrated LRBHO

• Rear dust cover trap door included

Handguard:

• Free-floating, slim 7" M-LOK rail

• Lightweight aircraft aluminum construction

• Black anodized finish

Bolt Carrier Group (BCG):

• AR-40 / 10MM Ramped BCG (Glock & Colt compatible)

• 8620 steel, phosphate coated

• Ramped for use with standard AR-15 hammers

• M-16 cut, full-auto rated (BATFE compliant)

Charging Handle:

• Standard MIL-SPEC AR-15 charging handle included

Gas System:

• Blowback operated – no gas block or gas tube required

Whether you're building a compact 10MM AR pistol or upgrading your setup, this Moriarti Arms upper assembly provides robust features, precision construction, and a smooth shooting experience.

Please Note: Images may not represent the exact product configuration. Rail and small components may vary due to production schedules. Current ETA is 8 weeks.