- Unscrew the spring retainer counter-clockwise from the body of the Pistol Rx Brake. Remove the spring retainer and spring from the Pistol Rx Brake.
- Insert your piston into the spring.
3. Align the piston assembly to the brake.
4. Hand tighten the mount until it is securely against the rear
of the Pistol Rx Brake.
5. Select either the 9mm or the .45ACP front cap (the Pistol Rx Brake comes with both front caps).
6. Thread tightly onto the barrel of your pistol.
