Help with first build, parts review

[bulletofsilver]

Managed to build a parts list with help from others.

AR15Performance 18" 6.5 Grendel ($159)

Toolcraft 6.5G BCG ($85.99)

Midwest Industries Combat Rail 15" M-LOK ($189.95)

Wotjek Weaponry .750 AGB Clamp ($35) Clamp on/off compression or set screw?

Wotjek Weaponry Gas Tube, Rifle, Black ($12)

Aero Precision M4E1 Threaded Receiver Set ($152)

Strike Industries ARCH CH ($22.50)

LaRue MBT ($87)

Magpul STR Stock Kit ($58)

Aero Precision AR15/M4 Carbine Buffer Kit, No Stock ($28.99)

Magpul K2+ Grip ($24.99)

Flash Hider (Not sure which)

$856 Total. I'd appreciate your input on this build, also anything I'm forgetting or if I messed up with component selection. Thank you.

EDITS:
AR15Performance Barrel --> ?
Added Wotjek Weaponry Gas Tube
Magpul MOE+ --> Magpul K2+