This Mini Muzzle Brake features a 0.456" bore diameter with 1/2x36 threading and a square shoulder design in a durable black finish.Mini Muzzle Brake with precision engineering0.456" bore diameter for optimal performance1/2x36 thread pitch for secure mountingSquare shoulder design for proper alignmentBlack finish for corrosion resistanceDesigned for firearms requiring 1/2x36 threading this muzzle brake helps reduce felt recoil and muzzle rise while maintaining compact dimensions for versatile applications.