lmaobaka Posted February 23 Share Posted February 23 Hey all, I picked up a new M4 about 1 1/2 years ago and just noticed that the barrel looks pitted (maybe baked carbon?). This is my first shotgun so I'm not sure if it is normal or not. It's got about 300 shells thru it so far with the majority being slugs and some bird shot. I cleaned twice so far after noticing the barrel. I've been using Hoppes 9 with a brass bore brush. Couldn't upload a photo so here is imgur link https://imgur.com/oFwfFoQ Any suggestions to better clean it? Thanks in advance! Quote Link to comment Share on other sites More sharing options...
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