CM4 Complete Upper

Usually Ships in 2 to 4 Weeks
(1 review) Write a Review

Base Model Specs

--Centurion Arms 16" CM4 5.56mm hammer forged barrel 1 in 7" twist extra thick chrome lining and barrel steel specifically engineered for machine guns for longer life (most all hammer forged barrels on the market are not made of this steel).
--Upper receiver is standard forged Mil-Spec with M4 Extended feed ramps
--Centurion Arms low profile pinned gas block
--13" MLOK Centurion Arms CMR Rail
--Mid-length gas tube
--Standard A2 Flash Hider

Options (when in stock and available)

--Centurion Arms 14.5" Midlength CHF Barrel or 10.3", 11.5", 12.5" or SOCOM Profile Carbine gas CHF Barrel
--Centurion Arms 9", 10", 12", Carbine Cutout, Mid-Cutout and 12" FSP (Carbine Front Sight Pocket) C4 Rail
--Centurion Arms 9.5", 11", 12" & 14" Original Standard CMR Handguard in Gen1 or Gen2 (with lightening cuts)
--Centurion Arms 9", 10" & 15" MLOK CMR Handguard
--Auto bolt carrier group with MPI tested bolt
--Standard charging handle or PRI gas buster charging handle
--BattleComp 1.5, BattleComp 2.1, Surefire SMB Muzzle Brake, Centurion Arms 9315 Open (3 or 4) Prong Flash Hiders and Centurion Arms 6315 Stoner 63 Flash Hider
--Backup Iron Sights- Knights MK12 Front and Rear or, Folding Micro Front and Folding Micro Rear (300M)

Price for Base Upper with Standard Specs $795.00

****Not all items shown in picture are included with purchase****


  • 5

    Posted by JC on Apr 11th 2019

    I had a lower with a lot of sentimental meaning to me and I wanted an extremely high-quality, working upper to match it with. Having been fortunate enough to train and work with people who know Monty I knew I'd be in good hands with a Centurion upper. I had a special request with my build which Centurion quickly and graciously accommodated. Communication was great. Finished product is still pretty new to me but is incredibly well balanced, was super easy to zero and shoots without issues. Will definitely look to CA in the future for any parts / components.