AR-15 stock length question.

[DesmoDucRob]

For my midlength 16" rifle build, I'm considering several stock options. My primary concern is length (as in length of pull) since it appears that both carbine and rifle length extension tubes will work fine. The length of pull that seems to fit me best is an M4-style adjustable stock (RRA 6-position to be exact) that is fully extended. I'm leaning toward using an A1 or A2 stock so that I can use the rifle length extension tubes and because with a middy, it just looks "more right" to me. With this in mind, does anyone know the dimensions of an A1 or A2 rifle stock. I've found that the ACE Skeleton stock is 9.9 inches long and uses a rifle extension tube. I've also found that A1 stocks are 5/8" shorter than A2 stocks. I've just not been able to put a short and accurate list together of stock lengths.

Any help is much appreciated-

 

[lost]

My A1 stock is right about 10" long

 

[SpeedRacer]

A1 is right around 10", the A2 10 5/8" long. A 6 position M4 stock fully extended is around 11".

 

[DesmoDucRob]

Thanks guys, so thus far the consensus is:

ACE Skeleton: 9.9"
A1: 10"
A2: 10 5/8"
M4 (extended): 11"

So I'm thinking that If I want a rifle-length buffer extension, and a long length of pull I'd probably be best-served by the plain ole' A2.

 

[SpeedRacer]

A2 is the way to go, unless you wanna spend the extra coin on a Magpul UBR which is 11.3" extended and the best of both worlds.

 

[Vanilla Gorilla]

I really like the LMT SOPMOD but its price made the baby Jesus weep. The VLTOR Clubfoot comes in a rifle length also IIRC.

 

[DesmoDucRob]

I really like the LMT SOPMOD but its price made the baby Jesus weep. The VLTOR Clubfoot comes in a rifle length also IIRC.

Update: I somehow came across a LMT SOPMOD for free. I've got a buddy with a "spare" This stock requires a Mil Spec buffer tube. Is it safe to assume that a milspec buffer tube will fit my Rock River receiver?

 

[Vanilla Gorilla]

It should. You have good friends.

 

[thatwhichisnt]

A2 is the way to go, unless you wanna spend the extra coin on a Magpul UBR which is 11.3" extended and the best of both worlds.

UBR rocks.

 

[SpeedRacer]

It should. You have good friends.

+1

I replaced the tube on my RR lower with a milspec, no problems. I'd order a new castle nut in case you jack yours up getting it off (like I did).

 

[DesmoDucRob]

+1

I replaced the tube on my RR lower with a milspec, no problems. I'd order a new castle nut in case you jack yours up getting it off (like I did).

I'm starting with a stripped lower, rather than a replacement, so I'm hoping It'll be easy. This put me back in "budget build" range again. This is looking like one heck of a budget build

 

[Vanilla Gorilla]

Be careful lining the threads up when you assemble it and don't forget to stake your castle nut when your done.

 

[DesmoDucRob]

Be careful lining the threads up when you assemble it and don't forget to stake your castle nut when your done.

I'm pretty sure this is just a normal area of caution to be aware of righ? Or is there a concern with Mil Spec tubes and commercial receivers that I'm not aware of.

 

[Vanilla Gorilla]

No just a normal caution. I have seen more than a couple people screw it up.