T4 Terminator muzzle brakes are designed for .338 Lapua Magnum to 375/408 Cheytac, on barrels with a muzzle diameter up to 31mm.
The T4 Dimensions are, 1.22”, 31mm diameter, 3.54”, 90mm long, 7.7-8.1 oz,  220-230 grams
Standard threads are 5/8 x 24, M18x1, ¾ x 24 & 28
The standard through hole is for a .338 & requires opening up to 0.025-0.030″ over calibre size if used on a larger calibre.
The T4 doesn’t have a top or bottom & has flats for a spanner and 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.
The T4 has 375 Cheytac Improved case with 350 SMK above it and a 338 Lapua Mag with 300 SMK below it.

The T4 has 375 Cheytac Improved case with 350 SMK above it
and a 338 Lapua Mag with 300 SMK below it.