The Griffin Armament MK1 PSD .300 Blackout AR pistol in Terra Brown (brand part no. MK1PSD30095PFDE-W) is Griffin Armament‘s complete suppressor-ready pistol, built as a system rather than a parts pile. It pairs a 9.5-inch threaded HEDP-profile barrel with a tuned pistol-length gas system, Griffin’s AR-SOB Gen 2 suppressor-optimized buffer and an SBA3 pistol brace, so it shoots soft with or without a can on the muzzle. The receivers are Type 3 hardcoat anodized in Terra Brown, the handguard is Griffin’s anti-rotation tabbed LOW-PRO rail with a full-length continuous Picatinny top, and the charging handle is the ambidextrous SN-ACH Gen 2 that vents suppressor gas away from your face. Griffin lists it at 96 ounces and 26 inches overall, with a Griffin muzzle device and an A3 grip, and states that it transfers as a pistol. For a shooter building a short suppressed .300 Blackout for home defense or hogs, this is the turnkey option.

Key Specifications

• It is chambered in .300 Blackout, the cartridge that makes the most of a short barrel and a suppressor.
• The barrel is 9.5 inches, threaded, in Griffin’s HEDP profile, matched to a tuned pistol-length gas system.
• It ships with an SBA3 pistol brace on the receiver extension, and Griffin sells this configuration as a pistol.
• The receivers are Type 3 hardcoat anodized in Terra Brown, a durable mil-spec-style finish.
• The handguard is Griffin’s anti-rotation tabbed LOW-PRO rail, which locks into the upper with a tab so it cannot twist under torque.
• The top rail is a full-length continuous Picatinny, giving optics and night vision an unbroken mounting surface.
• The charging handle is the SN-ACH Gen 2, an ambidextrous suppressor-normalized design.
• The buffer system is Griffin’s AR-SOB Gen 2 suppressor-optimized buffer, tuned to keep the gun soft when a can adds back-pressure.
• Weight is 96 ounces and overall length is 26 inches.
• A Griffin muzzle device and Griffin A3 grip complete the build.

Frequently Asked Questions

What gas system and buffer does it use? Griffin tunes a pistol-length gas system to a suppressor-optimized buffer, so it runs softly with or without a suppressor mounted.

Is it set up for a suppressor? Yes. The barrel is threaded and wears a Griffin muzzle device, the gas system is tuned for suppressed fire, and the buffer and charging handle are both suppressor-optimized designs.

What is the handguard? Griffin’s anti-rotation LOW-PRO rail, which tabs into the upper receiver and carries a full-length continuous Picatinny top rail.

Buy the Griffin Armament MK1 PSD .300 Blackout AR Pistol, 9.5-Inch, Terra Brown

Most short .300 Blackout builds get their gas, buffer and muzzle device sorted after the fact. Griffin sells this one already tuned as a system, which is why it shoots as soft as it does. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and see the rest of our AR pistols while you are here.