Can You Soak a Glock Barrel in M-Pro 7?

Yes, you can soak your Glock barrels in M-Pro 7 gun cleaner. I do this regularly. After I shoot my Glocks, I remove the barrels and drop them in a Tupperware container filled with M-Pro 7 gun cleaner. I let them soak for about 10 minutes and then run a few clean patches through the bore, then lubricate. Done.

Can M-Pro 7 Be Used on Muzzleloaders?

Yes, M-Pro 7 gun cleaner will clean any firearm that uses black powder.

The best way to clean a black powder gun is to first remove any unburnt powder by dry brushing the bore. Then spray a liberal amount of M-Pro 7 gun cleaner down the bore and let it soak for 10 minutes. Now you can run some clean patches down the bore. Done. You won’t need to use a bore brush.