Last week I ordered an A&S Engineering trigger guard for my M3, I love the ones I have on my M4's. A&S called me and said that Benelli had recently changed the OEM trigger guard and it was causing some fitment issues. They asked which I had, the "flat-back" or "pointed-back", they even sent pictures to illustrate the difference in the REAR of the housing, which I have posted. Just an fyi for anyone who wants to upgrade their M3, check your gun and order the correct TG to save yourself some headaches. (photos courtesy of A&S, used with permission)