Gunsmithing AR15 Rifle Length Receiver Extension Depth

[Tactical_Tom]

Anyone know how deep the hole in a AR15 rifle length receiver extension is? The M4 type receiver extension is 7 inches deep from the beginning of the threads to the back wall, but how deep is the rifle length. I think it’s around 10 inches but I need exact dimensions.

 

[huntersedge89]

Re: AR15 Rifle Length Receiver Extension Depth

Just curious, but what do you need the dimensions for?

 

[Tactical_Tom]

Re: AR15 Rifle Length Receiver Extension Depth

I am designing a modular rifle stock in CAD which will have the buffer tube as an integral part of the stock, but I need the dimensions for a rifle length buffer. I have already mostly finished the design for the carbine length stock.

 

[mjh30]

Re: AR15 Rifle Length Receiver Extension Depth

9 11/16 on the rifles internal dimensions, 6 15/16 on carbine, now these are Armalites specs.

 

[Tactical_Tom]

Re: AR15 Rifle Length Receiver Extension Depth

thanks alot!!!