Changing a pistol lower to a rifle lower

[jaymc75]

I'm a newbie when it comes to building AR's.. I've just always bought them complete.  I bought a BCM lower last week and found someone selling a complete lower here in Nashville. It's a Spikes set up as a pistol lower.  I want to change it in order to be able to use it with my BCM 16" upper. What do I need to do?

[Oh Shoot]

Assuming it has standard length "pistol" buffer tube on it and not one of the niche super shorty ones,  change buffer tube to carbine one that will accept a stock, attach stock, and put the upper on it.

 

Same buffer and spring inside are probably fine for adjustable carbine type tube/stock; though somebody might have put a heavier buffer in it than standard -- if so, you won't know if you need to change it till you shoot it.

 

Standard carbine buffer is around 2.8-3oz. If heavier, might still run fine with your rifle upper, might not, probably will.0

 

 

edit: oh yeah, if that pistol buffer tube is type that doesn't use a castle nut, you'll need that also.

 

So to be perfectly clear you need this for sure:

 

And possibly this:

 

 

 

 

With the slighter possibly of needing to swap this down the road:

 

And of course a stock.

 

Or you could just cut to the chase and get a basic entire stock/buffer assembly for like 40 clams plus shipping from PSA or wherever and have a few spare parts left over.

 

 

http://palmettostatearmory.com/index.php/catalog/product/view/id/1145/category/409/

 

 

 

 

 

- OS

Edited September 12, 2015 by Oh Shoot