The Q LLC fixed barrel assembly (brand part no. ACC-FIX-BARREL-8.6-12IN) steps up to a 12-inch stainless steel barrel chambered in 8.6 Blackout, finished with the same bead-blasted matte surface as Q’s shorter 8-inch option. Rifled at a fast 1:3-inch twist rate to stabilize 8.6 Blackout’s heavy-for-caliber bullets, the extra 4 inches of barrel length over the 8-inch option gives builders a bit more velocity and a longer sight radius while keeping the same fixed, non-reciprocating barrel design. It’s a direct component upgrade for anyone building or rebarreling an 8.6 Blackout platform.

Key Specifications

• Chambered in 8.6 Blackout.
• Measures 12 inches in length.
• Rifled at a fast 1:3-inch twist rate for heavy-for-caliber bullets.
• Machined from stainless steel with a bead-blasted matte finish.
• Built as a fixed (non-reciprocating) barrel assembly.

Frequently Asked Questions

How does the 12-inch compare to the 8-inch option? The extra 4 inches adds a bit more velocity and a longer sight radius while keeping the same fixed barrel design.

What twist rate does this barrel use? A fast 1:3-inch twist, matched to 8.6 Blackout’s heavy bullets.

Buy the Q LLC Fixed Barrel Assembly

Build or rebarrel your 8.6 Blackout platform with a purpose-built Q LLC barrel. Order it from our Q LLC lineup, part of our AR barrels selection, and get it shipped fast from our Lubbock, Texas gun shop.