What kind of buttstock do I need?

[fredfarmer]

I am finally going to build one of the lower and LPK that I bought in the group buy that we had a while back. I bought an assembled upper and need to know what kind of buttstock I need. It seems that there are commercial and mill spec? Are they different sizes? Anyone have any recommendations? Not looking to spend over $75 if possible.

I have never put a lower together, but there seems to be plenty of advice and walk throughs online so I should be fine.

I will build the upper and lower on the other lower and LPK that I bought.

TYIA!

[BlackGT]

It will depend on if the lower you bought is a commercial or mil-spec piece. I don't remember the sizes, but there is a difference and you will need to measure your lower to know which one will fit.

[CJ]

It will depend on if the lower you bought is a commercial or mil-spec piece. I don't remember the sizes, but there is a difference and you will need to measure your lower to know which one will fit.

All lower receivers are the same.

The difference is the diameter of the buffer tube. Commercial tubes are a larger diameter then military tubes.



The easiest way to tell is on a military tube the threads will stick out from the buffer tube. On a commercial tube the threads are cut into the tube, and it maintains the same OD all the way down. The commercial tubes do not have quite the same thread engagement, it varies slightly, but a commercial tube will fit on a mil spec receiver, so either way you're fine. Some argue there is some quality difference and other things but I don't see any good evidence either way.

And to answer your inevitable question no there is not any difference between the two. Neither is better than the other. Buy whichever one you can find a better deal on. I personally use commercial tubes because more stocks are available for them. Most all manufacturers make stocks for either size. Just be aware.

[fredfarmer]

Thanks!

[Nash B.]

All lower receivers are the same.

...

but a commercial tube will fit on a mil spec receiver

I'm confused now.

[CJ]

I'm confused now.

The thread engagement depth is slightly less on commercial tubes, the lowers are the same.

[fredfarmer]

I probably should make another thread for this, but I don't want to fill up the forum w/short one question threads.

Will these work in my AR-15?

http://www.brownells.com/.aspx/sid=9...0500&source=CJ

Slick Deals has coupon codes to get these for $270 shipped. I bought the lower through the group buy here and got a Rock River assembled upper at the gun show last weekend.

TYIA!

[motoman]

They'll work if your AR15 barrel is chambered for 5.56

[fredfarmer]

Yea, after looking at info online, it seems that I need to know more about the upper.

[motoman]

Yea, after looking at info online, it seems that I need to know more about the upper.

If it's your standard AR15 (nothing like a 6.8, .300, etc) then it'll be chambered in .223 or 5.56. You can shoot .223 and 5.56 out of a 5.56 barrel. Trying to shoot 5.56 out of a .223 barrel is not recommended because you could have pressure issues.

[fredfarmer]

OK thanks! I'll check it out when I get home later tonight.

[fredfarmer]

The barrel is stamped RR 223 wylde. Looking at the Rock River website, it says that this will accept both .223 and 5.56...

[idrivea4banger]

I'm sorry but everytime I scroll down the main page I read this: what kind of buttsex do I need.

[fredfarmer]

I'm sorry but everytime I scroll down the main page I read this: what kind of buttsex do I need.

Yea, I should have known better and just called it a stock. Especially with the demented folks that is dfwmustangs...

Anyone know of a local place that I can get a scope mount and castle nut wrench? I finally got everything I need to complete an ar-15 and I would like to give it to my bro for xmas.

TYIA!

[ceyko]

WHere is local to you?