Manx MPAR, Version 2

I think this is gonna be the final version of the Manx/Shrike ARs. But I said that about the last three versions, so no one can really tell. I've made the sight base solid along the length of the weapon so that nothing gets caught up there. It's made out of aluminum, so hopefully it won't be very heavy. Deep cuts are also in the base, to lighten it.
The pistol grip has been changed to be slightly smaller, I think the last one was too large.
The trigger guard is now a lot less thick, there was a lot of unneeded metal there.
The weapon's caliber has been changed to .216 Zephyr (from .216 Tyhpoon).
The magazine has been accordingly changed, and the rubber gripper has been removed. It is still quadruple-stack, though I'm having difficulty making a satisfactory design for it.
EDIT: Now in COLOR!!! Whooooo, COLOR, glorious COLOR.
Ph33r t3h C0|o|2z.
EDIT: I'm going to chamber it in 6.5 Grendel (and 6.5 Grendel Improved (just makin' the velocity go up a bit is all...) just for shits and giggles.
EDIT: I've changed the rifle to 6.5 Diamondback and I've also fiddled with the magwell/release a little. It now has a Galil-style release. Man, I just keep on changing this sucker.