alex90 Posted January 17, 2014 Share Posted January 17, 2014 I have started an m4 build and got myself a g&p zombie killer reciver and a second hand rail system of facebook selling site it the style with the big metal donut with loads of hole in and a larger nut to lock it all in not delta nut style And iv tryed dry fitting eveything and the metal donut is not screwing on to the body nicly and all the threads look fine and iv took some 800grit paper to take some of the paint of but still not going on properly Any ideas why Link to comment Share on other sites More sharing options...
Silentassasin Posted January 17, 2014 Share Posted January 17, 2014 can you post a picture?? Link to comment Share on other sites More sharing options...
alex90 Posted January 17, 2014 Author Share Posted January 17, 2014 The only thing I can think of is im doing it wrong haha but yeah give me 20mins other half on laptop Link to comment Share on other sites More sharing options...
alex90 Posted January 17, 2014 Author Share Posted January 17, 2014 hear u go Link to comment Share on other sites More sharing options...
Mack Posted January 17, 2014 Share Posted January 17, 2014 Most likely the barrel nut is Metric and the G&P threads are Imperial. You would have to rethread the receiver or find the same barrel nut with Imperial threading. Link to comment Share on other sites More sharing options...
alex90 Posted January 18, 2014 Author Share Posted January 18, 2014 Balls I was hoping that wasnt the case but get my old.man to make one up Or do u now wear sells them in there own as I love that lave system and done some custom work to it shortining the outer barrelnand stuff Link to comment Share on other sites More sharing options...
Supporters jcheeseright Posted January 18, 2014 Supporters Share Posted January 18, 2014 Link to comment Share on other sites More sharing options...
alex90 Posted January 18, 2014 Author Share Posted January 18, 2014 Any idea what the thread size is on the reciver Link to comment Share on other sites More sharing options...
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