Just bought a used G&P Sentry (Black) Magpul Lower... so excited!! It arrived in excellent external condition and came with the following mods:
SHS 7 metal tooth piston short-stroked by 2 teeth,
an XYT bevel gear (the G&P one only had 2 ARL notches which was annoying, so I replaced it)
a 3034 Mosfet with 25a HunterSeeker Armories Polyfuse.
Systema bucking and element H-Nub installed
Haven't bought the battery yet, but I figure I will run a 7.4 rather than an 11.1 in order to maintain some durability. Very excited to compare this gun to my KWA SR-10, Marui CQB-R (which has the best