SIG SAUER SIG50 - Manual (Page 39)

when it counts ™
www.sigsauer.com 39
6. install the bore guide in the receiver. replace the brass jag with the phosphor bronze brush, wet it with solvent and run
it through the barrel and out the muzzle. once the brush is forward of the muzzle, pull the brush back through the bore and
out of the chamber. do this a total of ten (10) times. after the tenth time, reapply the bore solvent and run the brush back
through another ten (10) times.(up and back is one time.)
noTe: neVer reverse the brush while inside the bore.
7. replace the bronze brush with the brass jag and roll a 4”x4” patch on to the jag. dry patch the bore until the patches
come out clean and dry.
8. roll a 4”x4” patch onto the jag. Wet the patch with copper fouling remover and push it through the bore and out the
muzzle. remove the old patch. repeat once more and clean up with dry patch. The wet patches can be worked back and
forth with short 4”-6” strokes to increase effectiveness. repeat this process until all copper fouling is removed. once all
fouling has been removed from the barrel, remove the bore guide and dry patch the chamber, neck, and bore until clean and
dry.
Warning: ammonia-based solvents should never be left in the barrel for more than 5 minutes, as they could permanently
etch the bore.
noTe: do not ever use any type of copper fouling remover on bronze brushes. it will attack them the same as fouling in the
bore. copper remover may be used with a nylon brush for heavily fouled barrels.
9. Wrap a 4” square patch around the jag. Wet the patch with bore solvent (not copper remover) and run it through the bore,
followed by one or two dry patches. copper fouling removers will leave the bore dry and totally stripped of any oil. Many
standard bore cleaners/solvents have some traces of oil that will stay in the bore.
10. The barrel should now be clean and the rifle ready to fire or store.