T2 Terminator muzzle brakes are designed for ..223 to 338 Lapua Magnums on barrels up to 21mm diameter
The T2 Dimensions are, 21mm, 0.82” diameter, 62mm, 2.36” long, 60-70 grams, 2.1-2.46 oz
The T2 standard threads are, ½ x 20, 28 & 32, 9/16 x 24, 28 & 32, 5/8 x 24, M14, 15, 16 & 17 x 1
The standard through hole is for a .224 & requires opening up to 0.025-0.030″ over calibre size if used on larger calibres.
The T2 doesn’t have a top or bottom, has flats for a spanner and a small indexing mark so they can be easily fitted by the Gunsmith. Ports are 90 degrees to the ground to reduce disturbance. The ports are angled back away from the shooter to minimise shooter discomfort and maximise performance.
It is recommended the rear of the brake be tapered down to the muzzle diameter when fitting.