I built this SPR from the receiver up...
POF USA P-415 lower receiver
VLTOR MUR-1 upper receiver
Magpul MIAD pistol group
Magpul PRS stock
PRI SPR Mk-2 Mod0 hand guard and swan rail
Ko-Tonic's 20" 6.8SPC barrel
Sightmark 8.5-25 x 56mm scope
AAC M4-2000 Supressor