Kaw Valley Precision Plan B Muzzle Brake .45 Caliber M18x1.5 Black. Designed to effortlessly attach and detach from your firearm our brake ensures quick and hassle-free adjustments to your shooting setup without the need for timing or shims. Specifications for Kaw Valley Precision Plan B Muzzle Brake: Manufacturer: Kaw Valley Precision Color: Black Projectile Caliber: .500 Caliber Caliber: .45 Finish: Nitride QPQ Fabric/Material: 17-4 Stainless Steel Gun Make: Universal Gun Model: Universal Barrel Material: 17-4 PH Stainless Steel Length: 1.27 in Features of Kaw Valley Precision Plan B Muzzle Brake OAL: 1.27in Bore: .500 (ANY Caliber) Shoulder: Square Package Contents: Kaw Valley Precision Plan B Muzzle Brake What firearm models does the manufacturer say Kaw Valley Precision Plan B Muzzle Brake is compatible with? The manufacturer says that Kaw Valley Precision Plan B Muzzle Brake is compatible with UniversalKaw Valley Precision KVP-PLANB-BRAKE09: Plan B Muzzle Brake .45 Caliber M18x1.5 Black