Andy Jones Posted October 12, 2005 Share Posted October 12, 2005 I purchased a customer take off mag extension a little while back for my M1S90. I was under the impression that the factory mag extension should be flush with the end of my 18.5" barrel. My mag extension extends about 1/4 of an inch past the end of the barrel. I know it won't hurt anything but just for looks I am not to hot on it. Is what I have a factory Benelli extension? Is there anything that I can do to shorten it a little? Also, does anyone know where I might be able to get a factory benelli clamp because the one that I have is too large for the groove on the extension. Thanks for any replies. Andy Quote Link to comment Share on other sites More sharing options...
nodark Posted October 13, 2005 Share Posted October 13, 2005 I'm guessing you don't have a factory extension (but I could be wrong) since it extends out past the barrel and the clamp doesn't fit. Although I don't wanna sound like a smartass but did you try flipping the barrel clamp the other way 'round and try screwing the barrel extension all the way down (it screws down onto the magazine male end and the extension itself screws into the nut. I wouldn't even attempt to shorten it any, just get a ported choke or something. Quote Link to comment Share on other sites More sharing options...
FN_FAL Posted October 13, 2005 Share Posted October 13, 2005 If its a Benelli ext. it will be vaccum wrapped with a cardboard backing. It will (would) have Benelli written all over the cardboard in red. If it is indeed a Benelli ext. it should be flush if installed properly. Like nodark said try flipping the clamp. Also maybe you have the extension attached not flush.?? Its doubtful but maybe. It would explain the ext. sticking out. See if the ext. is on a slight angle. Main thing is like I said when you bought it initally it would be CLEARLY marked Benelli about 2 dozen times on the cardboard backing, the plastic was sealed to. Benelli on an angle covering the cardboard. No way to shorten it unless you wanna really gamble, or are a machineist. Quote Link to comment Share on other sites More sharing options...
Andy Jones Posted October 13, 2005 Author Share Posted October 13, 2005 I know the barrel clamp is not a benelli part, that is just what he had laying around so he gave it to me. I purchased the tube from a benelli gunsmith who took it of a customers gun when they were upgrading to a 9 rd tube so I did not have the luxury of seeing it in the cardboard. The extension looks like a benelli extension in the way that it is machined where it screws into the collar nut, it looks just like my factory +1. everything is tight but it just won't go down. Is there some sort of difference between the old M1 and my new M1? Can anyone give me the overall measurement for a 7 rd mag tube mag tube that is flush with an 18.5"barrel? Andy Quote Link to comment Share on other sites More sharing options...
nodark Posted October 13, 2005 Share Posted October 13, 2005 it should be right around 9.25" Quote Link to comment Share on other sites More sharing options...
Andy Jones Posted October 13, 2005 Author Share Posted October 13, 2005 Originally posted by nodark: it should be right around 9.25" With the collar, mine is 9 11/16" Quote Link to comment Share on other sites More sharing options...
nodark Posted October 13, 2005 Share Posted October 13, 2005 can you screw the tube down into the collar any? Quote Link to comment Share on other sites More sharing options...
Andy Jones Posted October 19, 2005 Author Share Posted October 19, 2005 the collar is screwed onto the shotgun and the extension is screwed securely into the collar. I have confirmed that is is indeed a factory Benelli extension so I am stumped as to why it is too long. Andy Quote Link to comment Share on other sites More sharing options...
STA Posted October 19, 2005 Share Posted October 19, 2005 The current M1 tacticals have 18½" barrels and the 80155 extension sits flush. Older M1 tacticals had 19.75" barrels and the extension tubes were about 3/8" longer than the current 80155 tubes, as shown still wrapped. When installed, these older tubes sit about 7/8" behind the muzzle of the 19.75" barrels (or 3/8" in front of the new 18.5" barrels). Speaking of extensions, does anyone have any leads on the looong extensions or extension/speedloader kits that were offered for the M1 practical? Quote Link to comment Share on other sites More sharing options...
M1014 Posted October 19, 2005 Share Posted October 19, 2005 Quote Link to comment Share on other sites More sharing options...
M1014 Posted October 19, 2005 Share Posted October 19, 2005 Quote Link to comment Share on other sites More sharing options...
Andy Jones Posted October 20, 2005 Author Share Posted October 20, 2005 so that means I have a new M1 with the 18.5" barrel with an older extension. It all makes sense now. I guess it is time to look for a new extension and sell this one. Andy Originally posted by STA: The current M1 tacticals have 18½" barrels and the 80155 extension sits flush. Older M1 tacticals had 19.75" barrels and the extension tubes were about 3/8" longer than the current 80155 tubes, as shown still wrapped. When installed, these older tubes sit about 7/8" behind the muzzle of the 19.75" barrels (or 3/8" in front of the new 18.5" barrels). Speaking of extensions, does anyone have any leads on the looong extensions or extension/speedloader kits that were offered for the M1 practical? Quote Link to comment Share on other sites More sharing options...
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