Liberty Precision Machine Baby Bell Muzzle Brake 30 Caliber 5/8x24 Nitride Black. Important Disclaimer: Use of This Muzzle Device May Void the Warranty Policy of Some Silencer Manufacturers. Liberty Precision Machine LLC Will Not Be Held Liable for Damage to These Products. Always Confirm Alignment Before Use. Specifications for Liberty Precision Machine Baby Bell Muzzle Brake: Manufacturer: Liberty Precision Machine Color: Black Projectile Caliber: .30 Caliber Finish: Nitride Fabric/Material: 17-4 PH Stainless Steel Threads per Inch: 5/8x24 Length: 1.1 in Features of Liberty Precision Machine Baby Bell Muzzle Brake All critical alignment features machined in one set up Package Contents: Liberty Precision Machine Baby Bell Muzzle Brake Liberty Precision Machine LPM-2013: Baby Bell Muzzle Brake 30 Caliber 5/8X24 Nitride Black