After coming home from Iraq I was able to add a EOTech 552 on a (Aimpoint) gooseneck mount. Also I put a Specter Gear 30rd mag holder on my telescoping stock. I've since added a DPMS ambi safety and a Badger Ordnance Tactical charging handle latch. I added a D.R. Middlebrooks Jet Comp compensator too. 100% reduction in flip/rise and 80% reduction in recoil. Hold on target and bang away, like a .22lr!!