Muzzle brakes available in polished brass, polished aluminium or powder coated in matt black. 

86mm in length and 20-22mm in diameter 

(15.5 and 16mm slip on versions 22mm diameter) 

           suitable for .177 .22 and .25 calibre.                

Slip on fitting options secure via x2 m4 grub screws are for:

10mm (with a taper to 12mm) ,11.05mm, 14mm, 14.5mm, 15mm, 15.5mm and 16mm barrel diameters.

Screw on threaded options are:

1/2 inch unf x 20  and 14mm ccw