Discover the PWS MK111 MOD 1-M Rifle .223 Wylde SBR — a no-nonsense, duty-grade short barrel rifle built for reliability and performance. This NFA-registered SBR features an 11.85″ .223 Wylde barrel and Primary Weapons Systems’ proven long-stroke piston operating system, delivering cleaner operation, reduced fouling, and exceptional reliability compared to traditional direct impingement AR SBRs.
The MK111 MOD 1-M stays true to the classic Mod 1-M platform with a fully forged upper and lower, forward assist, and robust M-LOK handguard. It’s the ideal choice for law enforcement, home defense, tactical applications, and suppressed shooting where uncompromising performance matters most.
Key Features & Benefits
- Long-Stroke Piston System: Extremely reliable with minimal carbon buildup and gas blowback. Includes a 3-position adjustable gas regulator for optimized suppressed or unsuppressed use.
- 11.85″ .223 Wylde Barrel: Precision 41V50 steel barrel with 1:8 twist rate, delivering excellent velocity and sub-MOA accuracy potential with both .223 Remington and 5.56 NATO ammunition.
- Mod 1-M Forged Design: Traditional forged 7075-T6 aluminum upper with forward assist and lower for proven durability and mil-spec familiarity.
- 11.05″ M-LOK Handguard: Slim, free-floating design provides excellent accessory mounting options and superior heat dissipation.
- PWS Triad 556 Muzzle Device: Effective flash suppression and recoil reduction while remaining suppressor compatible.
- Premium Components: Radian Raptor ambidextrous charging handle, enhanced PTFE-coated mil-spec trigger, and PWS enhanced H2 buffer system for smooth recoil management.
- NFA SBR Configuration: Factory short-barrel rifle (requires NFA registration and tax stamp).
Why Choose the PWS MK111 MOD 1-M .223 Wylde SBR?
The MK111 MOD 1-M is widely regarded as a top-tier piston SBR for shooters seeking a simple, rugged, and highly dependable platform. Manufactured in the USA, it offers softer recoil, faster follow-up shots, and far easier maintenance than standard gas-impingement SBRs. At approximately 6.2–6.5 lbs, it’s lightweight enough for dynamic use yet built like a tank.
Perfect for professionals and serious enthusiasts who demand a piston-driven SBR that runs clean and performs flawlessly under heavy use.
Technical Specifications
- Caliber: .223 Wylde (compatible with .223 Rem & 5.56 NATO)
- Barrel Length: 11.85″ 41V50 Steel, 1:8 Twist
- Gas System: Carbine-Length, Long-Stroke Piston with 3-Position Adjustable Regulator
- Handguard: 11.05″ Free-Float M-LOK
- Upper Receiver: Forged 7075-T6 with Forward Assist
- Lower Receiver: Forged 7075-T6
- Muzzle Device: PWS Triad 556
- Trigger: Enhanced Mil-Spec PTFE-Coated
- Charging Handle: Radian Raptor Ambidextrous
- Weight: Approximately 6.2–6.5 lbs (unloaded)
- Classification: NFA Short Barrel Rifle (SBR)
Experience uncompromising piston performance. Add the PWS MK111 MOD 1-M Rifle .223 Wylde 11.85″ SBR to your NFA collection today.

















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