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Posted: 11/8/2009 10:11:33 AM EDT
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I have an original Colt M16 A1 with all original parts from the 70s. The selector is very rough. Going from Safe to Fire to Full requires a lot of pressure. Can anything be done to make that smoorther. I tried reducing the tension pistol grip screw and even added washers. That just made the pistol grip looser.
I have an LWRC and the selector on that one is perfect! It would be nice to have that type of smooth operating selector on the M16. |
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Before you start cutting stuff up, you have another AR, try swapping parts. If your M16 is full auto, try your semiauto selector in there anyway. You're just testing for fit and function. This'll give you an idea where the problem is. May be that if you swap detents, it'll make all the difference.
I had the opposite problem, the detent to selector groove interface was so shallow that you could push the selector out of place from the right side with your thumb about 1/4 inch. The detent/spring wasn't the problem, it had always functioned OK with another selector. I think it was the angle of cut in the selector groove where the detent rides that was the problem. |
I have been watching this thread with great interest - my XM16E1's selector is very positive, but a little hard to manipulate - it's a modified M16 slector, so I've been considering replacing it, but I may just cut a couple coils off. The selector on my 604 OTOH is a no-tic AR15 selector,and is very smooth. I found that the same trick worked great for me on the forward detent spring - I launched it about 12 times trying to get it in on this build, lost 3 detents and later found a spring in my shoe.  I ened up cutting 3-4 coils off a detent spring I had which was damaged on the end anyway, checked it before assy, and it looked as though it would work fine. I put it together, and it went together first try, but still has plenty of spring pressure to maintain the detent in place. Sometimes it's the little things.
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