Centurion Arms MK12 Mod 0 — 18" 5.56 NATO Rifle

The Centurion Arms MK12 Mod 0 is a 5.56 NATO AR‑pattern rifle built to replicate the form and function of the MK12 SPR (Special Purpose Rifle) concept. It pairs an 18" match stainless barrel with a free‑floating PRI Gen III handguard and SPR straight top rail, a mid‑length gas system, and a two‑stage precision trigger to deliver a platform suited for designated marksman or precision‑oriented applications.

Key features

• 18" match stainless, air‑gauged barrel, 1:7" twist — Cerakoted black
• PRI Gen III free‑floating handguard with SPR straight top rail and PRI flip‑up front sight (Mod 0 configuration)
• Centurion Sandcutter chrome BCG with E4 tapered lug bolt
• M84 Gas Buster® charging handle (large latch)
• OPS Inc. brake and collar compatible with suppressor systems (as configured)
• Centurion Arms AST two‑stage trigger for improved shot control
• Forged Mil‑Spec upper and lower receivers with M4 extended feed ramps
• Ergonomic controls: aluminum winter trigger guard, Ergo grip, B5/A2 style stock options depending on configuration

Technical specifications

• Caliber: 5.56 × 45 mm NATO
• Barrel: 18" stainless match, air‑gauged, 1:7" RH twist, Cerakote finish
• Gas system: Mid‑length, low‑profile pinned gas block
• Trigger: Centurion AST two‑stage trigger
• Muzzle device: OPS Inc. brake & collar (configured for suppressor interface)
• Upper/Lower: Forged CM4 receivers, M4 extended feed ramps
• Weight: Approx. 6.9 lb
• Overall length: ~32.5 in

What's in the box

• Centurion Arms MK12 Mod 0 — 18" 5.56 NATO Rifle
• (1) 30‑round magazine