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10/25/2008 3:50:56 PM EDT
I'm trying to assemble an A1 stock right now, on my AR, which until now had an A2 stock. The vendor that I bought the A1 stock from (it is an early 1960s surplus item) said that it would work with my regular buffer tube, and that I should use the drain screw to attach it and that I should not use the round piece that goes between the A2 buttplate and the buffertube. However, when I attach it as I was told to, the bolt is unable to lock back (either by using the button, or locking on empty mag). I took the stock off, and did some experiementation, and noticed that if the screw is driven in too far, the bolt can't lock back.



Any diagnosis?
10/25/2008 4:15:27 PM EDT
[#1]
You need a shorter stock screw. The A1 screw is shorter than the A2 screw.
10/25/2008 4:18:23 PM EDT
[#2]
I have one on my ar. You need a short a1 screw. Go to the retro area for some more info on this. You will like that a1
10/25/2008 5:34:47 PM EDT
[#3]
http://www.ar15.com/forums/topic.html?b=3&f=4&t=400980
10/25/2008 5:46:47 PM EDT
[#4]
If you're stuck on that and want to go shoot, you can usually get one from ACE hardware for about $0.67. It takes a allen wrench, is completely wrong for the install, and really bothers the retro folks. it will work until you can get a real one. I don't recall the sizes, but I took my A2 screw and found the right size using the nuts.

 
10/25/2008 7:23:42 PM EDT
[#5]
You can also put a more common A2 buttstock screw in a padded vise and cut three to four threads off the end, dress it up, and use it in place of an A1 screw,,,,,,,
10/25/2008 8:22:15 PM EDT
[#6]
Shorten your A2 screw by 5/8 inch- the thickness of the spacer you removed.
10/26/2008 11:08:22 AM EDT
[#7]
Thanks guys. A local gunshop generously gave me the correct A1 screw, gratis.



Gave them a ring after I went by the Lowes Home Improvement this morning. Being Sunday, True value was closed. Lowe's didn't have a single 1/4x28 screw in the store.



Anyhow, I've got it together now, and I like it. I still prefer the A2 length stock for bullseye type shooting, but the A1 seems more intuitive for combat type shooting. The other reason why I bought it was to allow my father to more comfortably shoot my AR- he's about 5'7'', so the when he shoots the A2 stock, his neck gets strained. (In time, I'm going to have to get him to get his own
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