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When Q built the 8.6 Blackout, they knew the original Rearend wasn't going to keep up with a cartridge that hits this hard. So they scaled the whole thing up. The Rearend XL keeps the same Cherry Bomb style taper mount system that made the original a favorite, just beefed up with a .338 caliber bore to clear the bigger bullet and soak up the extra energy that comes with it. This version wears standard 5/8×24 threads, which opens it up to a wide range of 8.6 BLK and .338 caliber barrels beyond Q's own lineup.
The main reason most folks grab a Rearend XL is suppressor mounting. This is the Quickie Fast-Attach interface for Q's SHORT CHOP and PORQ CHOP silencers, letting you spin a can on and off in seconds without tools and without losing your zero. The taper mount does the heavy lifting here, wedging the suppressor into consistent alignment every single time. Run it bare and it works as a legitimate muzzle brake too, cutting recoil on a cartridge that definitely produces some.
The difference comes down to the shoulder. The Rearend line is made for barrels with a standard 90 degree shoulder, so everything indexes clean and torques down without drama. It also picks up wrench flats at the rear, which come in handy if the brake ever decides to stay behind inside your suppressor when you unthread it. Up front you still get the classic 9/16 inch socket pocket, and Q recommends a 3/8 inch drive socket for the tightest fit during install and removal. That front socket method remains the preferred way to wrench on it.
If you already run Q suppressors or you're piecing together an 8.6 Blackout bolt gun or AR-10 style build, this is the muzzle device that ties it all together. Same taper system people trust, same solid lockup, just sized right for the big stuff.
It's the Quickie Fast-Attach mount for Q's SHORT CHOP and PORQ CHOP silencers, both built around the 8.6 Blackout. The taper mount interface lets the can spin on and off quickly without tools while keeping alignment consistent from one mounting to the next.
Function is basically the same, but the Rearend XL is designed for barrels with a standard 90 degree shoulder, which is what most threaded barrels have. It also adds rear wrench flats to make removal easier, especially if the brake stays stuck in your suppressor. The Cherry Bomb XL uses Q's taper shoulder to match their own barrels.
The preferred method is the 9/16 inch socket pocket machined into the front of the brake, and Q recommends a 3/8 inch drive socket for the most consistent fit. The rear wrench flats are there as a backup for removal. Torque it to Q's spec on a clean, properly threaded 5/8×24 muzzle with a 90 degree shoulder.
Yes. On its own it functions as a true muzzle brake and does a nice job knocking down recoil on the 8.6 Blackout. That makes it easy to shoot with or without the can and switch between the two whenever you want.
| UPC | 810152961452 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | RE-CBXL-5/8X24 |
| Caliber/Gauge | .338 Caliber |
| Model | |
| Product Type | Muzzle Brake |
| Shipping Weight | 0.128 |
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