Talon Claw U Barrel Clamping Mechanism

I cloned the barrel retaining mechanism into the front piece of the talon claw U, because i aqcuired a pretty barrel that i don't want to marr with the original screw grubbing mechanism. Also i feel like the original mechanism might lead to slight barrel misalignment.

The wider standard barrel nut can also be used, but i chose to include the slim variant.

I also added a variant of the front without picatinny rail, as that is how i'm running my personal tcu.

The o-ring used is a size 016 - referenced from the alchemist hardware list