Out of stock
SKU: Q-ACC-FIXBARREL-8-6-12
UPC: 850035705179
MPN: ACC-FIX-BARREL-8.6-12I
The Q Fix Barrel Assembly 8.6 Blk 12 is a drop-in 12-inch barrel chambered in 8.6 Blackout, built specifically for the Q Fix rifle platform. It serves shooters running compact, suppressor-ready builds who want the heavy-for-caliber subsonic performance that 8.6 Blackout was designed around. This assembly ships with a headspaced barrel extension, so the fit between barrel and bolt is set from the factory. It will only work with Q The Fix rifles and is not compatible with AR-10 or Remington 700 actions. For shooters already invested in the Fix system, it covers a wide range of barrel needs from suppressed range work to short-rifle field use.
The barrel uses 416R stainless steel cut with 5R single-point rifling at a fast 1:3 twist rate, the rate needed to stabilize the long, heavy 8.6 Blackout projectiles that make the cartridge effective subsonic. The 12-inch length sits in a light profile contour to keep weight at roughly 1 lb 12 oz, which holds the muzzle quick and balanced on a compact build. The muzzle is finished with an M18x1.5 tapered shoulder for direct-thread muzzle device mounting, and a 5/8x24 thread pitch is provided for standard 8.6 and .338 caliber attachments. The bead-blasted matte finish cuts glare and resists handling wear. The included headspaced extension removes the guesswork of matching barrel to bolt.
This barrel makes sense when you want to convert or rebuild a Q Fix into a dedicated 8.6 Blackout host, whether for suppressed subsonic shooting or a maneuverable threaded-muzzle rifle. The 5/8x24 threading pairs with common cans and muzzle devices, including options from Q's own lineup such as the Cherry Bomb in 8.6 Blackout. If you are sourcing a muzzle device or comparing other 8.6 hardware, our muzzle brake and flash hider selections cover the threads this barrel uses. As an FFL dealer, we can walk you through the build details before you order.
This barrel assembly is built for Q The Fix rifle platform only. It is not compatible with AR-10 or Remington 700 actions. The included headspaced barrel extension is matched to the Fix bolt system, so it functions as a direct assembly for that host.
The barrel uses a 1:3 twist rate with 5R single-point cut rifling. That fast twist is what stabilizes the long, heavy projectiles 8.6 Blackout relies on, particularly in subsonic loads run through a suppressor.
The muzzle features an M18x1.5 tapered shoulder and a 5/8x24 thread pitch, the standard pattern for 8.6 Blackout and .338 caliber muzzle devices and suppressors. That includes Q's own Cherry Bomb muzzle brake offered in 8.6 Blackout.
Yes. Each barrel ships complete with a headspaced barrel extension, so the critical fit between barrel and bolt is set from the factory for the Q Fix platform.
It suits compact 8.6 Blackout builds on the Q Fix, including suppressed subsonic shooting and short-rifle field setups. The light profile contour at about 1 lb 12 oz keeps the rifle quick-handling and balanced.
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