[Guest]

I just finished my first build. The upper/lower fit is perfect but the butt stock is a little loose.

Is that normal? I threaded the buffer tube in just far enough to touch the retainer without touching the center pin on it then slid on the stock and tightened it down. I played around with it and took it all apart again and found that the loose part is the actual threads where the buffer tube threads into the lower. Anything I can do to fix it?

 

[Guest]

Now, I'm no AR expert, but I imagine you could put some teflon tape around the threads. I use the stuff for all my air hose fittings, and it works great. Also, you could try locktite (or something simliar), but good luck taking it apart if needed.

 

[Guest]

I just finished my first build. The upper/lower fit is perfect but the butt stock is a little loose.

Is that normal? I threaded the buffer tube in just far enough to touch the retainer without touching the center pin on it then slid on the stock and tightened it down. I played around with it and took it all apart again and found that the loose part is the actual threads where the buffer tube threads into the lower. Anything I can do to fix it?

what stock do you have?

 

[Guest]

not sure about this but I thought there are 2 different size buffer tubes?

If I'm wrong (and I usually am ) please forgive me

 

[Guest]

not sure about this but I thought there are 2 different size buffer tubes?

If I'm wrong (and I usually am ) please forgive me

Yup. Thats why I asked what stock he bought. He may have bought a mill spec stock, which has a different tube size than the commercial clones do.

 

[Guest]

Yup. Thats why I asked what stock he bought. He may have bought a mill spec stock, which has a different tube size than the commercial clones do.

hey what do you know I got one right!!!

 

[Guest]

hey what do you know I got one right!!!

10 pts.

 

[Guest]

candle wax on the treads would stop the rattle and wouldnt be hard to unscrew

 

[Guest]

If it's an A2 stock, the tube should be screwed in tight as far as it'll go. Use a crescent wrench on the flats @ the end of the buffer tube. It shouldn't hit the center part of the buffer retaining pin but if it does it's okay to file it a bit. The tube should be just over the shoulder of the retainer pin when its screwed in tight. The 5/8" spacer goes on the end of the tube then the stock body. Put the stock screw in with a big honkin' screwdriver & make sure it's tight. It shouldn't rattle or wiggle if you did it right.

 

[Guest]

not sure about this but I thought there are 2 different size buffer tubes?

If I'm wrong (and I usually am ) please forgive me

There's only one size A2 buffer tube.

 

[Guest]

There's only one size A2 buffer tube.

Yup, milspec and commercial only apply to collaspible stocks
and the threads are the same size on both.

 

[Guest]

Though, there is an A1 and an A2 version stock and stock screw length, though it would have NOTHING to do with the tube not screwing into the reciever enough as you stated in your initial post.

Do I get 10 points too?

 

[Guest]

If it's an A2 stock, the tube should be screwed in tight as far as it'll go. Use a crescent wrench on the flats @ the end of the buffer tube. It shouldn't hit the center part of the buffer retaining pin but if it does it's okay to file it a bit. The tube should be just over the shoulder of the retainer pin when its screwed in tight. The 5/8" spacer goes on the end of the tube then the stock body. Put the stock screw in with a big honkin' screwdriver & make sure it's tight. It shouldn't rattle or wiggle if you did it right.

You sir, earned the 10 points in this thread

I was following the directions on ar15.com which said to install it the way I had it. A second look just now and they're installing a stock with a castle nut, not an A2 stock.

I threaded in the buffer tube all the way (another 1/4 to 1/2 turn) and tightened everything back up. Problem solved, it was operator error.

edit: thanks to everyone else for their replies too.

 

[Guest]

Yup, milspec and commercial only apply to collaspible stocks
and the threads are the same size on both.

Yup, you're right.