>>8770475The SAR has a shorter gas system.
I've built an AR, SAR and am working on a Micro now. It really is a fast process with a full kit, but I've got a bad habit of building short rifles from full size kits.
CNC Warrior had a run on Galil recievers and people say that they are pretty good (better than the ORF crap), but I don't think anyone has actually recieved them yet, so I'm not sure where the reviews are coming from. The recievers I bought were from Caspian, built for Century, but they seemed to check out OK tolerance wise, so I grabbed them.
The AR is too big and I don't shoot it. I love the SAR, the action is smooth and it's accurate. I built from a virgin AR barrel so I could drill the gas port a bit on the small side as I use a suppressor most of the time with the rifle. The Micro looks like it's going to be a lot of fun, but it has cost me an arm and a leg so far. I'm really lagging on putting it together as I've been working on some other projects at the moment, but I'm still pretty excited about it.