James Cook Posted October 25, 2005 Share Posted October 25, 2005 Good evening, I recently bought a 28 inch M1 barrel from a gentleman to use for my M1S90. When I tried to install the barrel, it lacks about 1/8th of an inch of seating properly in the receiver. I thought that these barrels would work on an M1S90. Any ideas? Thanks, James Quote Link to comment Share on other sites More sharing options...
tucker301 Posted October 25, 2005 Share Posted October 25, 2005 Any visible differences between the new barrel and the original? Did you pull the bolt back slightly to allow the barrel to go back? Quote Link to comment Share on other sites More sharing options...
James Cook Posted October 25, 2005 Author Share Posted October 25, 2005 A bit more info...I examined things in more detail last night. I completely removed the bolt and slid the barrel in so that I could see whats going on. There is a small square part of the barrel that sticks out on the end, and fits into a U-shaped slot in the top of the receiver. My original 18-inch barrel slides right in. The long barrel appears to be slightly off-center, so the edge of the square part rests on the top of the slot. It looks like if I were to file about 1/32-1/16th off of the side of the square part it would slide on in. Has anyone else had to do this? Should I do this? Should I send it in to Benelli? I don't have a pair of calipers, so I can't get an accurate measurement of the difference between the two barrels size. Also, I have another barrel coming from a different source. Once I get it I will try it and see if it has the same issue. Thanks, James Quote Link to comment Share on other sites More sharing options...
wallhanger54 Posted October 26, 2005 Share Posted October 26, 2005 1. Is it an older barrel? 2. You could have either a bent or misaligned barrel extention (silver part with ejector). When in doubt, Benelli can probably fix it for you. Not a hard fix, but having the right tool for the right job helps. Quote Link to comment Share on other sites More sharing options...
James Cook Posted October 27, 2005 Author Share Posted October 27, 2005 I received the second barrel tonight. Upon installing, it hung up just like the first one. I decided to wiggle it a bit with some light downward pressure. This caused it to slide on in. I tried the same thing with the first barrel, and it too seated fine. In contrast, my original 18-inch barrel drops right in, with no extra effort required. Since that is what I am used to, I expected the longer barrels to behave the same way. Putting the gun back together with one of the long barrels, the action seems to be functioning fine. I am going to a shoot on Saturday, and will put a few rounds through it to confirm. I will follow up on Saturday evening with a function report. Thanks, James Quote Link to comment Share on other sites More sharing options...
surfmaster Posted November 4, 2005 Share Posted November 4, 2005 Hi James: I have an older Benelli M1 Super 90 with a fixed seven-round magazine tube and I, too, an considering getting a 21" vent rib barrel. Did your gun function after you put on the new barrel? Quote Link to comment Share on other sites More sharing options...
bootster Posted November 9, 2005 Share Posted November 9, 2005 A fixed magazine tube? I would doubt that, but then I don't know. Mine is seven rd,but unscrews for cleaning. Quote Link to comment Share on other sites More sharing options...
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