The trigger group really, really surprised me.... I mean its plastic for Pete's sake. Pulling New Frontier Armory's Accu-Group trigger the first time blew me away with a crisp 4.5lb trigger pull was which is leaps above any standard DPMS parts trigger group (which by the way about 95% of the industry uses). Crisp, very little take, up, no grittiness, and almost no over-travel. I found myself wondering if I could use this trigger in my other AR builds and although I have not tried, the LW-15 is 100% compatible with any Mil-Spec lower parts so, if you wanted to drop in a Geissele trigger and aluminum take down pins or other parts, you could.