Well have you shot it yet? Did the mag feed right? Did the bayo sticking out alter your grouping. Most duckbills are crap when it comes to performance. They look interesting but don't feed well IMHO. No bang=brain drain. I had an M44 that I shot with the bayo out. It sure made the old farts at the range giggle and a few came by with smart ass comments lol. In the end I took everything off my sks that I had put on her, even the bayo and cleaning rod, and surprisingly it shot better! Tacticool starts at ARs and goes up from there.YMMV