CMMG 16" chrome lined barrel, A2 flash hider, 6 position stock, YHM 4 rail light weight handguard, YHM flip front and rear sights, ergonomic verticle grip, and EOTech 511.A65. It came with a hard case, two 30 round magazines, cleaning kit, and a thick instruction manual. I also purchased an addition two 30 round magazines. I went with CMMG because a few of my friends have their products and they couldn't stop raving about them. I've met the CMMG crew and visited their machine shop during a few events they've held out their location. I'm fairly new to firearms, and they took the time to help me decide what I needed for my AR and they couldn't have been nicer. I've fired my friend's CMMG's before, but I can't wait to get out to the range with mine.