motorwerks

why would you have to pin it?

Yeah I have been threading every AR15 lower I build for years now for a 4-40 set screw to hold the take down pin in place. I think my lower even comes with that. Ill get to see it again this weekend when I get to pick it up.

I did a little more reading around and I think the Delta ring/Barrel nuts use the same Wrench from AR15 to .308 variant.

poop figured out the bolt catch question, guess Ill be ordering one of those when I get paid. http://308ar.com/forum/index.php/topic,690.msg4663.html#msg4663

OK so I am like a bunch totally new to the .308 platform and I just bought my first lower (its not even here yet because I live in CA and we have a stupid 10 day waiting period.) and I had an AR15 parts kit worth of parts left over from 5 or 6 other builds. Anyhow I ordered the Pivot pin and Takedown pin from Brownells and they are here. My Tactical Machine lower came with its own bolt catch pin so I am covered there, but what I am most curious about is..... 1. Can I use AR15 hand guard if I use a .308 delta ring assembly and the front little dinger (cant for the life of me remember what its called right now). I'm also kind of wondering if Ill be able to use the MOE hand guard ??? 2. Will a .223 lower's bolt catch work in a .308 lower? I cant seem to get an honest answer from anyone. I know DPMS has a different part number but I have seen a handful of ".308" parts layouts that look like this one.... and have the only parts listed as "Exclusive" as the 3 pins.

I would bet you could just bent the gas tube by hand if it didn't match up. Its only a 1/16th or so.