This brake is designed to reduce recoil, keep excess noise down and allow owners to work on their rifles in states required to pin brakes. It is .720 diameter apx the same as the barrel diameter so the gas block will slide over after it has been pinned, it only adds 5/8" to the length of the barrel.
4 - 1/4" ports spaced evenly around the device, does not need to be clocked. A crush washer is not needed or included.
This is an example of the raw machined brake only. They will be melonite treated black to match the barrels.

For use with 6.8  caliber and smaller with 5/8-24 threaded muzzles.

Sells for $680

PressureTrace Internal Ballistics System

This is the interior ballistics portion of the RSI Shooting Lab system. It consists of pressure instrumentation and software that runs on a Windows PC. You must have access to a PC while using this product.

Barrel harmonic calculations are also provided when velocities are entered from a chronograph but a chronograph is not required for operation. PressureTrace II will work equally well with any good chronograph

  Blem-  threads and bore are straight (1st op)  During the second op that cuts the chamfer on the front they may be off a little. Will not effect function and can only be notice if looking close down the barrel.

If a quiet muzzle device is your number one requirement this is the device. The length was held to a minimum to decrease weight and not add length to the firearm. Noise is directed down range. Chamfer on front of device pushes high velocity turbulant gases to the outside to prevent disturbing bullet flight. Noticable recoil reduction. Crush washer is not needed.

.840" dia, 1.5"long, 1.9oz

For use with our SOCOM 5.56, 3 Gun 5.56 and Valkyrie  barrels with 5/8" muzzle threads
 

4 top  ports,  to keep muzzle rise down.
6 side ports 
 

Photo not correct at the moment-

4 top  ports,  to keep muzzle rise down.
6 side ports 
 

Photo not correct at the moment-