Was looking into picking up a Mag Pul PRS. Are they NJ legal considering they are somewhat adjustable, however they are not collapsable. And has anyone used/installed one and are they "bolt on"

I have one on my 308 AR and love it.. 

I believe in the spirit of the law the stock is legal as the plates adjust and not the actual stock.. 

 

and since you didnt ask.. here it is on my AR..

Install was simple.. 

 

 

Was looking into picking up a Mag Pul PRS. Are they NJ legal considering they are somewhat adjustable, however they are not collapsable. And has anyone used/installed one and are they "bolt on"

 

 

Good question. What I can tell you is that under the 94 AWB, which shared the same evil features language as the NJ AWB currently has, adjustable butt plates were acceptable to the BATFE.  Fulton armory sold their guardian shorty fixed butt stock with their adjustable butt plate on new AWB complaint rifles without causing any BATFE issues for themselves. I know accuracy speaks was building guns with full length stocks and their adjustable butt plate as well. 

 

That doesn't mean there is zero risk in NJ, it just means it is defensible with some examples.