Amazing lower and great size for ar pistol / sbr - Daniel Defense DDM4 V7 S 11.5in 5.56 Complete Upper Receiver w/ Flash Hider

I know a lot of people are high on MK18 10.3"s and they are absolutely great guns, but just a little more with this 11.5" makes a monumental difference. There is quite a bit of data and research out there to demonstrate this. With that being said, this upper has been rock solid for me. I mated it with an aero gen 2 lower and it fits perfectly (though i had to adjust ever so slightly the extra feature tension screw at the bottom of the receiver/inside pistol grip area). It does come with a vertical foregrip so - just a fair warning - please understand the law behind putting one of those on an AR pistol before moving forward. This upper is lightweight and rock solid with daniel defense's track record to back it up. I can't recommend it enough and this has become one of my favorite rifles easily!