I recently assembled a Mega lower which came with a nylon tipped tensioning screw. I've used Accu Wedge before but never had a lower with this screw feature.

I think I get how it works. Adjust it to where the lower and upper fit snug then back off just a little so as not to over tension the fit and make it difficult to remove the take down pin.

Question is, does this need to be loctited? Screwing it in, there seems to be a bit of resistance and it may well stay in place without loctite. Also, is this system in anyway detrimental to the pins or pin holes?

I did not loctite my Aero set(s) and have seen no issue with it backing out thus far.

I didn't loctite my Mega and it is still maintaining the same tension after 200 rounds or so.

Henryrifle

I got frustrated with mine, I couldn't get the tension adjusted just right. It was either too lose and the fit still sloppy, or else I couldn't quite close it. It wouldn't keep the same tension, and would back out too. Eventually I gave up and put in an accuwedge.