AAC MPW 300 Blackout SBR - Used Demo

AAC MPW 9" SHORT BARREL RIFLE - .300 BLACKOUT SBR, PISTOL-LENGTH GAS, MAGPUL STOCK, NFA SHORT BARREL RIFLE

The AAC MPW 9" is a .300 Blackout Short Barrel Rifle engineered from day one to run suppressed. AAC co-developed the .300 Blackout cartridge specifically to maximize performance through short, suppressed barrels, and the MPW 9" is the rifle built to match. Reintroduced for 2025 with refined internals and updated components, it delivers full .30-caliber performance in an AR-15 footprint without sacrificing magazine capacity. The 9" 4150 CMV barrel runs a pistol-length gas system tuned for reliable cycling with both 220-grain subsonic and supersonic loads. At 5 lbs 9 oz with a Magpul MOE SL-K stock and Magpul MOE SL grip, the MPW 9" is a compact, suppressor-ready SBR that requires an ATF Form 4 and $200 tax stamp.

THIS RIFLES HISTORY

We used this rifle for media content and as a display piece.  It's had roughly 50-75 rounds of 300 Blackout through it, and has spent most of its life on the shelf.  The rifle is in like-new condition.  The only sign of it being fired is light copper markings on the shell deflector.  

FEATURES

• Caliber: .300 AAC Blackout
• Barrel: 9", 4150 CMV steel, FNC coated, 1:7 twist, 5/8x24 threaded
• Gas system: Pistol-length, tuned for 9" barrel
• Muzzle device: AAC BLACKOUT Flash Hider, 1x16LH thread pattern
• Handguard: 8" AAC ARX free-floating rail
• Bolt carrier group: Full chrome carrier and cam pin
• Bolt: Chrome Carpenter 158 steel, mil-spec, shot-peened
• Trigger: 2-stage
• Stock: Magpul MOE SL-K, lightweight and adjustable
• Grip: Magpul MOE SL
• Weight: 5 lbs 9 oz

WHAT'S INCLUDED

• AAC MPW 9" Short Barrel Rifle
• AAC BLACKOUT Flash Hider (installed)