Spartan117 wrote:They're all Magpuls. The first one is an ACS on a mil-spec tube. The one on the SIG is a UBR, and the one on the second AR is an M93B, which is no longer being made. I like wide stocks, and these are all wide, with great cheek-welds. The UBR and M93B are great because the stock extends from the bottom, leaving the top cheek-piece close to the receiver, instead of a metal tube to press your face against. The lock up is also unbeatable, it rivals a fixed stock. They also have presets, so you can pull them back and they automatically stop where you want them to.
The ACS is decent, but I just bought it to try it out. It's nice because it's a drop-in replacement, whereas the other two are all proprietary parts. The other two also cost nearly $300 a piece. I've tried most of the stocks out there, but I always come back to Magpul.
Great info, thanks! I was thinking about a UBR for my latest, and now I'm convinced!