Centurion Arms CM4 Midweight — 16" 5.56 NATO Rifle

The Centurion Arms CM4 Midweight is a 16‑inch AR‑pattern rifle chambered in 5.56 NATO, built to provide a balance between durability and manageable weight. The rifle pairs a chrome‑lined, hammer‑forged 16" barrel with forged CM4 upper and lower receivers, a mid‑length gas system, and a 13.5" M‑LOK CMR handguard for accessory mounting. Standard features include a Centurion Sandcutter BCG, M84 Gas Buster® charging handle, H2 buffer and a B5 Bravo stock.

Key features

• 16" chrome‑lined, hammer‑forged midweight barrel, 1:7 twist, MIL‑SPEC 11595E steel certification
• Forged CM4 upper and lower receivers with M4 extended feed ramps
• 13.5" Centurion M‑LOK CMR handguard for modular accessory mounting
• Mid‑length gas system with low‑profile pinned gas block for consistent cycling
• Centurion Sandcutter BCG with E4 tapered lug bolt (chrome lined)
• M84 Gas Buster® charging handle (large latch) for positive manipulation
• H2 buffer, A2 grip, aluminum winter trigger guard, and B5 Bravo stock for ergonomic control

Technical specifications

• Caliber: 5.56 NATO
• Barrel length: 16.0 in, chrome‑lined hammer‑forged, midweight profile
• Twist rate: 1:7 RH
• Handguard: 13.5" Centurion M‑LOK CMR rail
• Upper / Lower: Forged CM4 receivers, Mil‑Spec feed ramps
• Stock / Grip: B5 Bravo stock, A2 grip
• Fire control: Mil‑Spec fire control group
• Weight (unloaded): ~6.4 lb
• Overall length: 32.5 in (stock collapsed)

What's in the box

• Centurion Arms CM4 Midweight — 16" 5.56 NATO
• (1) 30‑round magazine