I am going to (legally) add a shoulder stock to a PLR-16 and turn it into a SBW (ATF really needs my $200:eek. I'm guessing that a skeleton frame stock can be attached in a relatively simple, non-destructive manner by utilizing the sling attach lug and the lower hand grip screws. But, before I start this project, or even submit my application for NFA licensing, I would really like to hear from anyone that has worked on something similar.

The gun does not have a lot of recoil straight back, probably due in part to the Kel-Tec compensator. I'm thinking of using 3/16 steel rod (maybe 4130?) for the stock material, with something welded on for shoulder contact.

I'm open to any comments or suggestions.