Patriot Ordnance Factory Drop In Trigger System AR15/AR10 - $107.97 (Free S/H over $49)

Finally got it installed. Had to slightly shave down the rubber feet on the bottom to get the holes lined up, but that's it. Havent test fired it yet though.

AR308 requires a significantly harder hit to ignite primers.
I had to send back 2 Elf triggers to get one that would reliably work in my 308.
That is a possibility of why they say it won't work.
Most all AR15/AR308 triggers will physically fit and are interchangeable....except for the primer striking power.

From my understanding, if your DPMS .308 lower doesn't have a straight trigger guard this trigger should fit fine as-is with no mods required.