This worked well, too, with no trimming necessary.
Lower:
Complete Spike's Lower, once part of a Spike's M4LE (Spike's Tactical)
Ergo Grip (Brownells)
Magpul B.A.D. Lever (Brownells)
Blue Force Gear VCAS (Brownells)
M.I Rear Sling Mount
Upper:
Spike's Tactical upper (once part of a Spike's 10.5" upper from AIM Surplus)
14.5" Daniel Defense Lightweight Midlength Barrel (PK Firearms, mounted by ADCO)
SEI/Gemtech G5 Vortex suppressor mount (Gemtech, mounted by ADCO)
13" Troy TRX Extreme rail (Troy, mounted by ADCO)
Nikon M223 1-4x (Bud's Gun Shop)
LaRue Tactical Mount (LaRue)
Surefire Scout (EE) in Gear Sector Offset Mount (Gear Sector)
Troy Front & Rear Battlesight (Troy)
Magpul AFG (Brownells)
Upper assembled by ADCO...fantastic work, reasonably priced, and QUICK turnaround.