NooYawka

Still adding to this old topic but I was able to successfully attach a Beretta CX4 Bottom and Side Accessory Rail kit (SKU: E00270) with the long Beretta side pic rails (SKU: EU00007) to my formerly bubba'd MR-1. I needed to make a small steel backing plate to go inside the forestock. The plate needed two threaded holes of the same distance apart as the holes in the side pic rails. I drilled two holes through the forestock and attached the pic rail with screws: use the correct length! If anyone is interested in trying this let me know. I'll post some pictures, and a copy of the CAD drawing, plus specs for the screws. (I used an online machining company to make the backing plate.)

Sorry to resurrect a thread from the grave, but I recently used the Beretta CX-4 Storm tri-rail: https://www.beretta.com/en-us/gun-accessories/rifles-carbines/rails/beretta-cx4-bottom-and-side-accessory-rail-kit/ Beretta part number E00270 With the Beretta lon accessory rail: https://www.beretta.com/en-us/gun-accessories/rifles-carbines/rails/beretta-long-aluminum-cx4-storm-picatinny-side-rail/ Beretta part number EU00007 On my Benelli MR-1 I had to manufacture a metal plate to go inside the forend for hex screws to bolt into.

I know this thread is incredibly old... but hopefully I can bring some joy to any MR-1 owners out there. I bought an old MR-1 on GunBroker. It had been badly Bubba'd. They'd taken off the rear sight. They used some bad glue to attempt to attach Pic rails on the forend! Anyway - the good news is that I was able to clean the glue off. Still no tri-rail so I think I'm going to end up drilling holes and bolting on Magpul aluminum pic rails. As for the rear sight: I took a gamble and bought an LPA Sights BAR11RD5 from a USA distributor. https://www.lpasights.com/en/products/bar11rd5/ I got rear sight screws from Midwest Gun Works - but it looks like I bought the last ones. Maybe screws from a Benelli shotgun would work? The sight fits perfectly and yesterday I took it to the range - it was basically perfect out to 25 yards - sufficient for my needs.