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Questions & Answers
Does this fit Winchester XPR 6.8 Western rifle? Expert Answer

The Precision Reflex MSTN QC Brakes 6.8mm will require a threaded barrel (5/8x24) in order to fit to your rifle. If you do not have 5/8x24 threads, this muzzle device will not fit.

by Ethan, Gear Expert, May 31, 2022
Does this include the shims shown? Expert Answer

Shims are included.

by Corey K., Gear Expert, July 30, 2019

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Product Info for Precision Reflex MSTN QC Brakes 6.8mm

The QCB has been cut from solid stainless steel bar stock for greater resistance to heat and burnout. Specs: 304 Stainless .95in dia. X 2.05in long thread is 5/8in- 24in The thread end of the brake tapers down to a .750in diameter. The brake comes with a selection of spacer shims to set the timing of the brake. The 3 holes should be at the 1 O'clock position when tightened into place. Tighten the brake into place using a round screw driver in the 1st slot closest to the barrel.image

Specifications for Precision Reflex MSTN QC Brakes 6.8mm:

Manufacturer: Precision Reflex
Caliber: 6.8mm Remington SPC
Fabric/Material: Stainless Steel
Threads per Inch: 5/8x24
Gun Make: AR Platform
Outer Diameter: 0.95 in
Length: 2 in
Weight: 3.2 oz
Included Accessories: Spacer shims
Condition: New
Diameter: 0.95 in

Package Contents:

  • Precision Reflex MSTN QC Brakes 6.8mm

Precision Reflex MSTN QC Brakes 6.8mm Orderable Models

List of Orderable Models

  • Precision Reflex MSTN QC Brake 6.8mm, SPC Black, Black, 05-0088B , MPN: 05-0088B , UPC: 090222551527 , Code: 3AK-BMB-MSQC68-05-0088B
  • Precision Reflex MSTN QC Brake 6.8mm, Black, 05-0088 , MPN: 05-0088 , UPC: 090222551510 , Code: 3AK-BMB-MSQC68-05-0088

Precision Reflex MSTN QC Brakes 6.8mm Unavailable & Discontinued Models

List of Unorderable Models

  • USED Precision Reflex MSTN QC Brake 6.8mm, SPC Black, Black, 05-0088B, EDEMO1, Used, Condition Fair , MPN: 05-0088B-EDEMO1 , Code: 3AK-BMB-MSQC68-05-0088B-EDEMO1
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Last updated 2026-07-01 UTC.