MasterPiece Arms Cowl Induction Muzzle Brake, 6.5 Caliber

The MasterPiece Arms Cowl Induction Muzzle Brake (brand part number MZLBRAKE-65) is a competition-focused muzzle brake built for 6.5mm-and-under rifles, engineered specifically for PRS-style matches where recoil control between shots matters most. Machined from black-nitrided, high-tensile-strength steel, it uses multiple blast ports to redirect propellant gases and counter recoil, and MasterPiece Arms’ own testing measured a 63 percent reduction in felt recoil. A jam-nut collar system lets the shooter lock the brake and nut against each other in the correct clocked position, using two machined flats to both level the brake body and interface with a wrench for installation. That design eliminates the need for shims and keeps the brake’s bore aligned perpendicular to the barrel shoulder, minimizing any shift in point of impact.

Key Specifications

• Threaded 5/8-24 tpi.
• Rated for 6.5mm-caliber and smaller rifles.
• Machined from black-nitrided, high-tensile-strength steel.
• Uses multiple blast ports to redirect gas and counter recoil.
• Tested to reduce felt recoil by 63 percent.
• Jam-nut collar system with two machined flats for leveling and wrench installation.
• Aligns the bore perpendicular to the barrel shoulder to minimize point-of-impact shift.

Frequently Asked Questions

How much does it reduce recoil? MasterPiece Arms measured a 63 percent reduction in felt recoil in their own testing.

Do I need shims to install it? No, the jam-nut collar system eliminates the need for shims.

What’s it built for? PRS-style competition rifles, where staying on target for fast follow-up shots matters most.

Buy the MasterPiece Arms Cowl Induction Muzzle Brake, 6.5 Caliber

Stay on target between shots with a brake purpose-built for PRS competition. Order it from our MasterPiece Arms lineup, part of our rifle accessories and parts selection, at our Lubbock, Texas gun shop for fast, direct shipping.