MK1 PSD 9.5″ 300BLK SBR

Description

Griffin Armament’s MK1 AR-15 Series represents a fully-featured, quality, and value-packed carbine worthy of use as your primary carbine out of the box. Built as a system with each component working in harmony to create an incredibly soft-shooting platform suppressed or unsuppressed, while maintaining milspec tolerances for compatibility with other milspec parts on the market. This is not just another milspec AR, each component is finely tuned and tweaked to produce a superior system that just plain works. 

The MK1 PSD 9.5″ .300 Blackout SBR is a true front line fighting carbine. The tuned pistol-length gas system and suppressor optimized buffer system ensure a soft yet reliable gas system suppressed or unsuppressed. Griffin’s Anti-Rotation LOW-PRO Rails provide a rigid, yet lightweight handguard that is comfortable in the hand, yet robust enough to accommodate accessories such as lights and lasers. These rails have a tab that interfaces with the upper to prevent rotation of the rail under torque.  

MK1 Firearms allow the end user to customize their build to fit their needs. Options include choice of muzzle device, furniture color, fixed or adjustable gas block, and milspec or gas pocket BCG. Users can also choose between Griffin’s time-tested 416R SS HEDP barrel, or our new 4140 CMV Chrome-Lined HEDP barrel – both of which provide exceptional accuracy and lifespan. 

This rifle due to its barrel length transfers as an SBR and requires proper Form 4 paperwork to acquire, per the ATF. Please choose an NFA dealer at checkout and they will assist you with the transfer. As of 1/1/2026, Tax Stamps for SBRs are $0, but the paperwork still needs to be completed. 

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Features

• Griffin Forged Upper And Lower Type 3 Hardcoat Anodized
• Anti-rotation Tabbed LOW-PRO Rail locks into upper
• Full-length Contiguous Picatinny Rail
• Choice of 416R SS HEDP Barrel or 4140 CMV Chrome-Lined HEDP Barrel
• Choice of Griffin Enhanced BCG or Gas Pocket BCG
• Choice of Muzzle Device
• Choice of Fixed PRIMO Gas Block or Griffin Adjustable Gas Block
• Griffin Ambidextrous Safety Selector
• Griffin A3 Grip (Choice of Color)
• Griffin Enhanced Trigger Guard
• Griffin SN-ACH™ Gen 2 (Suppressor Normalized Ambi Charging Handle)
• Griffin Contour Connect QD End Plate
• Griffin Maritime Receiver Extension™
• Griffin AR-SOB (Suppressor Optimized Buffer)
• Griffin ECS™ Extreme Condition Stock (Choice of Color)
• Griffin RailShield™ 4 Piece Panel Set (Choice of Color)
• Griffin Dimpled Takedown Pins

*This is a regulated item. Please choose your preferred transferring dealer at checkout