SIG SAUER SIGM400 Rifle - Manual (Page 61)

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8.1. Cleaning the Bore
1. Run a patch soaked in solvent through the bore.
2. Allow the solvent to soak in the barrel for at least 5 minutes.
3. Move on to section 8.3 and clean the bolt while the solvent works on loosening the residue in the bore of the barrel.
4. If the barrel is heavily fouled use a cleaning rod and a brass or nylon bore brush of the proper bore diameter and clean
the bore from the chamber end to the muzzle end. Pass the brush completely out past the muzzle and do not change
direction in the bore as the brush can become stuck in the bore.
5. Run cotton patches through the bore until the patches come out clean. The bore and chamber of the barrel may be
lightly lubricated with an oily patch if the rifle is to be stored. Upon returning the rifle to service you must remove the oil
by running a dry patch through the barrel.
8.2. Cleaning Chamber
Keep muzzle pointed upward to keep chamber residue from running down into the cleaned bore.
1. Use a chamber brush coated in solvent to clean chamber.
2. Use a minimum of five (5) plunge strokes and three (3) 360 degree clockwise rotations.
3. Clean residue with cotton patches, swabs or a chamber mop.
11SIG455_M400MiniManual.indd 61 8/2/11 3:58 PM