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Posted: 4/22/2004 12:20:08 PM EDT
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Got my M16 a few weeks ago. Colt. Also bought a 9mm Colt upper to go with it. I got a VM Hyteck magblock to use Uzi mags. The cartridge bases sit too low in the mag to be stripped by the bolt. They all seem to have this problem; the lips have a curl in them that makes the whole cartridge sit to low. I bought some 25 rd. IMI used and some new 32 rd MecGar. All have that curl. Metal is hard & brittle; starts cracking when you try to bend the lips. All advice appreciated! |
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I had the same problem with a couple of my uzi mags. I took the mags apart and bent the followers. I bent them so the bullet would set flater to the feed lips. Before I started the rear of the case sat lower then the bullet end. Know that they set flat to the feed lips I have no more problems. I also had bought some uzi mags that where already cut for the colt set up. Those I took a welder replaced the metal and recut the mag release hole. Hope this helps Just go slow when bending the followers it dont take much. |
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Yeah I got the same problem. Went to the range. took 4 mags. 1 uzi 25rd convert 1 S/A 30 rd 2 S/A 40 rd On my 2 40rd mags the lips are curved. The center is lower then the ends. One of the 40's works perfect, the other doesn't. When I loaded both up with 10 rds each, I noticed the one that did not work, the round would sit almost level. The one that did work, the round sat at a angle. On the 25rd uzi mag, the lips are straight. The ends are the same as the middle and when loaded the rounds sit at a slight angle. I will take some pictures later this weekend. 
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When I started the bolt would just skip over the round. Once I bent the follower so the round would set flat to the feed lips it worked fine. When I bent the follower the rear of the case came up 30 or 40 thousands. I did not mess with the feed lips at all. The other thing you can check. check mags in mag block when it is out of the gun. Push mags in to block. See if the top part of the mag cut was not cut to high. If it was it would let the mag ride lower. No problem weld up and re-cut. |
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I had straightened some of the feed lips last nite. That really didn't help to much tho. I just bent the followers on four mags; 2 with straightened lips and 2 without. Don't have a welder, doubt I could weld that small anyway. Haven't welded since high school shop. In 1956. I used a propane torch to soften the lips and followers enough to bend. I just about ruined one mag yesterday because that metal in the mag body and the follower is so hard and brittle. Lip started to split in the web at the back and the follower started to split in the web on the side. I will go to the range tomorrow and report back. Thanks for your help. |
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Good news, bad news! Yes, it rained all day yesterday, finally got to the range this pm. The adjustments cured the problem of the bolt riding over the cartridges. Now the cartridges in all five mags I have sometimes cock up; the bullet is to high to go into the chamber. Get this: one mag loves Brown Bear. I had carried some with me and tried it after it couldn't reliably feed good brass ammo. Same mag has the same problems as all the rest with brass ammo. My buddy has a similar setup, Colt M16, Colt 9mm upper, VM Hytech magblock, 25 rd. Texaco mags. He says his runs perfect. I see some about ramping the bolt or something to that effect on the 9mm's. What does that mean? |
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