Centurion Arms CM4 Lightweight — 16" 5.56 NATO Rifle

The Centurion Arms CM4 Lightweight Rifle in 5.56 NATO is a purpose‑built AR‑pattern rifle that balances reduced weight with service‑grade durability. The CM4 Lightweight pairs a 16" chrome‑lined, hammer‑forged barrel with a forged CM4 upper and lower, a mid‑length gas system and an M‑LOK handguard to provide a dependable platform for range, duty, or recreational shooting. The threaded barrel (if shown with muzzle device in photos) and accessory compatibility make it suitable for optics, lights, and other common AR accessories.

Key features

• 16" chrome‑lined hammer‑forged barrel, 1:7 twist — military‑grade steel certified to MIL‑SPEC 11595E for extended service life
• Forged CM4 upper & lower receivers with M4 extended feed ramps
• 13" M‑LOK Centurion Arms CMR rail for modular accessory mounting
• Mid‑length gas system with low‑profile pinned gas block for reliable cycling and reduced recoil impulse
• Centurion Arms Sandcutter BCG with E4 tapered lug bolt (chrome lined bore and chamber)
• H2 buffer and B5 Bravo stock for shooter comfort and repeatable cheek weld

Technical specifications

• Caliber: 5.56 NATO
• Barrel length: 16.0 in, chrome‑lined, hammer‑forged, Government profile under handguard; .680 step ahead of .750 gas journal
• Twist rate: 1:7 RH
• Handguard: 13" Centurion M‑LOK CMR rail
• Upper/Lower: Forged CM4 receivers, mil‑spec feed ramps
• Weight: ~6.1 lb (unloaded)
• Overall length: 32.5 in (stock collapsed)

What's in the box

• Centurion Arms CM4 Lightweight Rifle (5.56)
• (1) 30‑round magazine