Its a BM XM-15 E2A3 with a 1:9 chrome lined 16" barrel. The trigger sucks and I will be replacing it but not sure with what....any ideas???
If it is strictly a range-toy, then get whatever is the lightest trigger you can afford. IF you plan on it being useful for an emergency, I highly recommend the
RRA 2-stage. It is a great trigger, at a great price and is robust. If you are 100% concerned about reliability, the stock trigger is best - if you can live with it.
If you get a varmint type AR, you might want that LaRue + scope and bipod to go on that. It would be of greater value on a rifle built for accuracy (heavier stainless barrel, free floated preferably).
Enjoy that rifle, but for a 16" barrel service-style AR like that, I'd consider some sort of shorter range combat optic like an Aimpoint, EOtech or better yet - ACOG down the road. I have an Aimpoint and an ACOG. I love them both, but give the edge to the ACOG. For me, there's not much more fun than shooting a 16" AR while sighting through an ACOG looking at that brightly lit chevron. It just makes it so pathetically easy. It is almost like a video game. Almost makes me giggle like a little girl the way I can tag the targets with total ease, speed and accuracy. I should have got one much earlier.
BTW, there's nothing wrong with adding other firearms to gun photos. I've got an HK USP in 9mm and love it.