“One of the best overall stocks on the market. The UBR Gen 2 is the most stable collapsible stock there is and allows you to choose what type of buffer system you want to use (carbine or A5). The storage compartment is awesome to have for extra batteries or parts and although it weighs more than most stocks out there, it can help balance your rifle from being front heavy which is more often the case with lights and other attachments being equipped. This stock should be on most military rifles due to its functionality, but lowest bidder seems to be the priority for most. If you’re looking to build up a GPR, this is definitely an excellent option.”