Moondog Posted November 3, 2017 Share Posted November 3, 2017 (edited) Does anybody have recommendations for a plain/inexpensive Picatinny rail for an M2 Field? I'm drilling and tapping the top of my American edition M2 which comes with a .32" sighting grove on the top of the receiver. I'd like to find a rail with a flat base that will fit within that flat sighting groove to provide a snug fit and low-profile so I can sight along the ribs and bead with optics removed. Unfortunately, the bases I've been suggested aren't ideal because: 1) Are too short because they're made for the M2 Tactical with the ghost ring. or 2) Are made for round-top receivers like the Tactical or SBE and have a concave base. 3) Are flat top but too wide and won't fit within the .32" groove. 4) Are bulky rails with integrated saddles. Edited November 3, 2017 by Moondog Link to comment Share on other sites More sharing options...
GunCat Posted November 4, 2017 Share Posted November 4, 2017 The Weaver 417M, or EGW Picatinny rail, for the Mossberg 500 has a .310” flat section underneath that will set right into the slot on the M2 reciever. Link to comment Share on other sites More sharing options...
GunCat Posted November 4, 2017 Share Posted November 4, 2017 Those bases, and any other you find, will still block your view of the rib when the base is installed on the receiver. Link to comment Share on other sites More sharing options...
crashandlearn Posted May 14, 2018 Share Posted May 14, 2018 I am just going through the same exercise that you went through in November. I want to mount a rail on a Benelli M2 SP01 which has the grove on the receiver top. I am advised that the grove makes the receiver too thin to tap. So it is a case of finding a rail to fit the grove and possibly using some Devcon adhesive to secure it. I am wondering what you finally did and if it worked. Any other advice welcome. Thanks. Link to comment Share on other sites More sharing options...
GunCat Posted May 16, 2018 Share Posted May 16, 2018 (edited) I have drilled and tapped several standard M2 receivers for optic bases. As far as I know none have ever had an issue. The front section of the receiver is quite thin. Use a sharp tap and don't get too heavy handed with tightening those 2 screws, 8-10 in/lbs is plenty. The back half of the receiver is much thicker so the rear 2 screws have more tread engagement, will do more of the support work, and can stand more torque. Edited May 16, 2018 by GunCat Link to comment Share on other sites More sharing options...
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