Hi, first post here. I recently bought a NJ compliant (aka castrated) Ruger AR 556. Pinned buttstock, no barrel threads, came from Ruger like this. I assumed the buttstock was pinned so as to disable the adjustable buttstock that *looks* to be on there, and they just removed the spring, tapped some threads and put a bolt in. Fair enough, right? Well, the length of pull is a hair too much for me, so I went looking for a fixed stock that had the ideal LOP to swap out, and I found one. So I removed the pin and bolt, removed the buttstock and... what?? There are no adjustment holes in the buffer tube. So that brings up the question, why was it pinned in the first place? It's not like you can be illegal by removing the pinning and replacing the buttstock with an adjustable one, there are no adjustment holes. So why pin it at all?