The Q Mini Fix .300 Blackout SBR is a compact bolt-action short-barreled rifle with an 8-inch barrel (brand part no. MINIFIX-300BLK-8IN-SBR). Q calls it a precision-built SBR for shooters who demand accuracy and versatility in a lightweight package, and says it is fast-handling and quiet when suppressed. The folding stock, the two-stage trigger and the modular design let it adapt to the setup, whether you shoot from a truck, a blind or a ridge. A 1:5 twist suits the heavy bullets that .300 Blackout shooters run subsonic. It is a natural host for a suppressed hunting or range rifle that takes up very little room.

Key Specifications

• The chambering is .300 Blackout, a cartridge that runs supersonic and subsonic loads from short barrels.
• Barrel length is 8 inches, which keeps the rifle extremely compact.
• The action is a bolt action, a manually cycled design with no action noise when suppressed.
• Rifling twist is 1:5, fast enough to stabilize the heavy subsonic bullets popular in this cartridge.
• Capacity is 10+1 rounds, a practical count for hunting and range sessions.
• The stock is a folding stock, shrinking the rifle further for travel and storage.
• The trigger is a two-stage design, which Q fits for precise, deliberate shots.
• It is suppressor-ready for any Q Quickie Fast-Attach silencer, according to Q.
• Q builds it with a modular design, so it adapts to optics and accessories for different jobs.
• The layout is adjustable and ergonomic, which Q says gives real comfort and control.

Frequently Asked Questions

Is the 1:5 twist good for subsonic .300 Blackout? Yes. A 1:5 twist is fast enough to stabilize the heavy bullets used in subsonic .300 Blackout loads, and Q says the rifle is quiet when suppressed.

Do I need ATF approval to buy this? No. As of October 9, 2026, ATF no longer requires Form 4 approval, registration or a tax stamp for short-barreled rifles. It transfers on a Form 4473 with a background check through a Class 3 (SOT) dealer. State and local laws still apply. Taking an SBR across state lines still requires an approved ATF Form 5320.20.

Does it fold? Yes. The Mini Fix uses a folding stock, which shortens the rifle for transport.

Buy the Q Mini Fix .300 Blackout SBR, 8-Inch Barrel, Bolt Action

As of October 9, 2026, this short-barreled rifle transfers on a Form 4473 with a background check at your Class 3 (SOT) dealer, with no Form 4 or tax stamp; state and local laws still apply. Order through Q‘s short-barreled rifle lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer. Pair it with a Q can and you have one of the quietest, smallest bolt guns on the market.