Commercial M4 buttstock buffer tubes > Rifles, Uppers, Lowers, Barrels, and more

Posted: 10/25/2007 5:54:00 PM EDT

have you guys found that they vary somewhat in size from one manufacturer to the other? In other words, some stocks are loose or tight on different tubes?

Posted: 10/25/2007 6:30:58 PM EDT

[#1]

It's probably more in the plastic stock. Tolerances on molded parts by different manufacturers are probably to blame.

Posted: 10/26/2007 6:39:00 AM EDT

[#2]

Quoted:
It's probably more in the plastic stock. Tolerances on molded parts by different manufacturers are probably to blame.

+1 On the plastic tolerances.

If your stock is a bit loose, try applying a strip of aluminum tape to the top of the buffer tube directly underneath the stock.

Posted: 10/26/2007 6:57:22 AM EDT

[#3]

Quoted:

Quoted:
It's probably more in the plastic stock. Tolerances on molded parts by different manufacturers are probably to blame.

+1 On the plastic tolerances.

If your stock is a bit loose, try applying a strip of aluminum tape to the top of the buffer tube directly underneath the stock.

Just the opposite. too tight. 3 different buffer tubes, Bushmaster, Rockriver, and whatever Del-ton uses. The Del-ton tube is the most forgiving. I'm ordering a Cav-Arms tube to see if that is better.

Posted: 10/26/2007 7:01:09 AM EDT

[#4]

Quoted:
Just the opposite. too tight.

Too tight!?

You shouldn’t bitch then!

Posted: 10/26/2007 10:13:38 AM EDT

[#5]

I'm wondering if you're trying to fit a milspec dimensioned stock piece onto commercial spec tubes.

Posted: 10/26/2007 11:32:47 AM EDT

[#6]

Quoted:
I'm wondering if you're trying to fit a milspec dimensioned stock piece onto commercial spec tubes.

Good possibility!

Posted: 10/26/2007 11:35:01 AM EDT

[#7]

Quoted:
Any ideas on opening them up slightly?

Sandpaper and a wooden dowel perhaps. Or take a look at the hardware store for a sanding drum that you could rig up in a drill to get all the way down into the stock. Sand, check fit, repeat.

Posted: 10/26/2007 11:38:36 AM EDT

[#8]

what you should do, before ruining the stocks is get yourself a stronger milspec receiver extension.

Posted: 10/26/2007 4:24:40 PM EDT

[#9]

I've got two Cav Arms stocks. They look well made, but are awfully tight. Am I going to need a Cav Arms buffer tube? I realize that not being mil spec, the spec can vary.

edited to say: Okay, I took a small file and smoothed out the mouth of the stock that woulnd't go on at all. Apparently the one that wouldn't go on, had flash or something right there.

Both Cav-Arms stocks are tighter than any other ones of that style that I have. Tight is good. Will get looser in time no doubt.

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