A Larger version of the popular 3-gun brake, but scaled for maximum recoil reduction on larger than .223/5.56 chamberings.
These brakes are available threaded 5/8"-24, 11/16"-24, 3/4-24, 3/4"-28, 3/4"-32, and 18-1.5 MM.
These are now available in 11/16"-24 thread pattern for the .450 Calibers, and 3/4"-28 for up to .50 Caliber.
The 5/8"-24 size will fit ANY rifle threaded 5/8"-24 and has enough shoulder the seat the crushwasher (approx. .675").
The 3/4"-32 size fit some Barrett rifles, Armalite AR-30s, 450bushmasters, 50beowolfs and are well suited for custom install on heavy barrel rifles without having to remove massive amounts of material to thread at 5/8"-24.
These come in black oxide finish and require crushwasher, shims, peelwasher, or gunsmith fitting to index properly (unless you're real lucky and it indexes as is)
Add crush washer for for additional $2