DD makes great rifles! I love their Omega rails because their narrower on the sides so it feels more natural when not using a vertical grip. Also, that's a cool rail model which allows you to get a light/whatever way out there which helps a lot if you suppress it. Magpul is awesome and the BAD lever is a great add on.
You just need a really nice trigger (recommend the Wilson Combat TTU in single stage...unbelievably good), a quality QD 5.56mm suppressor, a BCM gunfighter latch (recommend the large as it's just right IMHO), a tritium front post insert from Trijicon (same for the rear), LaRue QD-Levers for everything, a tactical light (I like the lighter models like a Surefire Scout and use the tail cap vice the pressure switch...ps's are always getting activated at the wrong moment under stress), and the Magpul single/dual point sling with QDs.
Definitely an excellent rifle, congrats! You might like this video:
https://danieldefense.com/TortureTest
Edit: FYI, that TTU is expensive, but seriously is better than most 1911 triggers I've tried...until you're talking big money like WC, Les Baer, etc. Weighting is perfect for a CQB AR15 and I prefer the single stage unless it's a long range precision setup; no need for slack take-up. Eventually every AR I have will have one in it!
