Dan_uk86 Posted May 5, 2011 Share Posted May 5, 2011 I just got hold of a 1 piece hop unit. my plan was to install it into my src m4a1 but this is made for a 2 piece hop unit. How would i go about modding the lower reciever to take the 1 piece hop unit? pic below Link to comment Share on other sites More sharing options...
Supporters Nutster Posted May 5, 2011 Supporters Share Posted May 5, 2011 try cutting from these markings, try the smaller markings first Uploaded with ImageShack.us Link to comment Share on other sites More sharing options...
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