Posted: 10/30/2012 2:42:52 PM EDT
| I bought the .22 kit, placed it in my upper, and it wouldn't go into battery. Now it won't come out at all, no movement whatsoever. Any ideas or experience with this? |
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I have seen this happen with a few uppers with various makes of conversions. Fact is my next door neighbor had it happen with a Cliener kit in a DPMS rifle. To remove the conversion there are a couple of different methods that work. One is to take a cleaning rod, run it down the barrel and use it to tap out the conversion. The other method you go through the bottom of the receiver and use a dowel rod and tap out the conversion.
Whey are they tight to begin with? Could be a dirty chamber as mentioned. Could be a tight upper receiver (I have seen this one but only once). Could be in the conversion itself. I have seen one where the rails were not seated deeply enough into the chamber adapter and the rails were too wide to fit properly into the upper. This was easily fixed with a file and five minutes of hand work. There are several things that can cause this. I would try the conversion in another upper and see if I could eliminate at least one of the possibilities. |
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There are a few oddly designed or out of spec op handles that interfear with the conversions, try a different one if you have one at hand.
Sometimes it is the unit itself. I had a Bushmaster 20" H-bar that I used quite a bit with a conversion with no issues. Sold the gun to a friend and he bought a Ceiner that works fine but is a tight install and needs to be tapped out with a rod to remove. This friend and myself sat down one afternoon and compared and measured guns and conversion units and could reach no conclusion but the guess that certain tollerences were stacking and causeing the tightness. I offered to swap units with him but his conclusion was that the tightness of his unit was a factor in the very fine performance and accuracy of his tight unit and that he would trade off the hassle of needing to tap it out against the great accuracy he is enjoying |
| I had a dropin CMMG Conversion do this once. It was very tight trying to get it in the reciever and back out. My problem was with the rails being too tight for the reciever. I had to lap the rails on a piece of glass with sandpaper laying on top of the glass. Doing it on glass is not all that neccesary and any good level surface would work. This may solve your problem. Just need to remove a little from the outside edges of the rails lengthwise till it fits nicely. First though when you get it out try it in another upper too. |