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Will extension tube fit on my m4 super 90?


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5+1 means 5 in the tube + 1 in the chamber. 5+1+1 is 5 in the tube, 1 in the chamber, and one on the rail. However you say it, that first number is the total number you can fit in your magazine. My M4 will hold 7+1+1 of 2 3/4" shells. When I had the dummy extension it would only hold 5+1+1. Obviously using 3" shells will reduce those numbers.


Pay close attention to the shell length. You should be able to fit seven 2 3/4" shells in that tube. Some 2 3/4" shells are actually slightly longer than that and you'll only be able to fit six in there. Are you loading 3" shells? With my full length mag tube I can fit seven and that last one juuuuuuuust fits in there. If I use Royal low recoil OO buck I can only fit 6 even though they're 2 3/4" shells, they're maybe 1/16th of an inch longer than regular 2 3/4" shells but that's enough to keep that seventh shell from joining the party.

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maybe you have some sort of limiter in the mag tube?


This conclusion seems to be the best. But, i don't see any reason why one of Kips tubes would not fit. In fact I would bet money that if you bought one of Kips full length tubes or one from FFT it would fit with no problems.

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