She's a heavy girl - Daniel Defense M4A1 FSP 14.5in 5.56 Nato Upper Receiver Group

The biggest draw for this upper is the famously bomb-proof RIS II hand guard, and after playing with it some I can see why it has this reputation. The barrel has shot well, and is likely more accurate than I am. Carbine gas is carbine gas, and just as she's a heavy girl, she's also a pushy girl. An H1 buffer calms the recoil impulse down some. For someone interested in mounting lasers, lights, and other doodads onto this rail, I can be certain that there will be very little, if any, shifting from this rail that would affect zero (if you believe that that's even a problem to start with). The Daniel Defense BCG is a smooth operator and the Grip-N-Rip charging handle is a nice touch. Good quality upper. A touch pricey, and you could probably replicate something VERY close to this for less. That being said, I'm happy with my purchase.