
Centurion Arms has recently debuted their latest offering for the AR-15/M4 pattern with their new 5.56 inch 300 blackout upper receiver.
Centurion Arms states “We’re excited to introduce our latest addition to the Centurion Arms family – the 300BLK Micro Gas Barrel with CMR Rail and C4 BCG!
This all-in-one package features our renowned 5.5″ Micro Gas 300BLK stainless barrel with 1/5 twist, along with a CM4 Forged Upper receiver with M4 Extended feed ramps, a low profile tall gas block pinned to the barrel, and a micro-length straight gas tube.
The icing on the cake? The package also includes a 4.75″ MLOK Centurion Arms Rail and an A2 flash hider, as well as our premium C4 BCG.
The C4 BCG is machined from MIL-SPEC Carpenter 158 Steel and features Magnetic Particle Inspection (MPI), Shot Peening, Tool Steel Extractor with enhanced extractor spring, Chrome Lined Carrier, Hardened, Chrome Lined Gas Key with staked Grade 8 Fasteners as per MIL-SPEC.
This complete package is perfect for those who demand the best in performance, durability, and accuracy.
Whether you’re a law enforcement officer or just a gun enthusiast, the 300BLK Micro Gas Barrel with CMR Rail and C4 BCG is sure to exceed your expectations.”
KEY DETAILS:
- Weight: 2lbs 9.6oz
- Length: 14.375in (includes Forward Assist)
- Centurion Arms 5.5″ Micro Gas 300BLK stainless barrel, 1/5 twist
- Centurion Arms CM4 Forged Upper receiver is standard forged Mil-Spec with M4 Extended feed ramps
- Centurion Arms : Low profile tall gas block pinned to the barrel
- 4.75″ MLOK Centurion Arms Rail
- Micro-length straight gas tube
- A2 flash hider
- Optional: Centurion Arms C4 BCG: Full Auto machined from MIL-SPEC Carpenter 158 Steel. MPI (Magnetic Particle Inspected), Shot Peened, Tool Steel Extractor w/enhanced extractor spring, Chrome Lined Carrier, Hardened, Chrome Lined Gas Key w/staked Grade 8 Fasteners as per MIL-SPEC.
- Optional: Add Magpul MBUS Pro Flip Up Sights

To learn more about Centurion Arms. CLICK HERE