SIG SAUER SIG50 - Manual (Page 38)

38 www.sigsauer.com
8.0. cleaning
clean the rifle after 30 to 40 rounds in order to maintain “benchrest accuracy.”
8.1 Removing and installing the muzzle brake
1. The rifle can be cleaned with the muzzle brake on or off.
2. To remove the muzzle brake, use a 12-inch or 300mm adjustable wrench with two layers of masking tape on the jaws.
clamp barrel in padded vise just behind the brake. you may have to use a wood mallet and/or nylon hammer, and give a
sharp rap on the end of the wrench to break it loose. The brake is installed with standard right-hand threads.
3. To reinstall the muzzle brake, put 2 or 3 drops of gun oil on the barrel threads. for the last 1/4 turn, use the adjustable
wrench and give it a fast turn to properly tighten the muzzle brake. for “Pinch clamp” muzzle brakes, screw brake on to
barrel until it stops. Back brake off until level and tighten cross-bolt to 80-85 inch-pounds. (check the muzzle brake for
looseness every 50 rounds, then tighten as necessary.)
8.2 cleaning Procedure
1. ensure the rifle is unloaded.
2. remove the magazine, buttstock, and bolt from the rifle.
3. ensure the muzzle is lower than the action.
4. roll one patch all the way around the brass jag. The cotton patch should be 4”x6” for maximum effect. Wet the patch with
solvent. roll the cleaning rod with the wet patch in the chamber and neck area.
5. unroll approximately 2” of the wet patch, leaving the other 2/3rds on the jag. Push the remaining wet patch through the
bore and remove it at the muzzle.