Both the Lonex V3 gearbox ( 1 complete and 1 shell ) are working great on the Beta Project AK and LCT RPK .
LCT trigger has a smaller front post on their trigger so I had to buy another Lonex trigger. The other LCT parts that I did use, fit with no problems. The LCT motor mount fits better on the Lonex than on their own LCT gearbox shell.
I had to trim down the V3 SHS trigger switch assembly. It didn't fit well but I wanted the extended trigger wedge on the SHS.
I found the piston guide rails on the Lonex gearbox shells to be too sharp on the edges. Just sand them down to prevent them from cutting into the piston.
Everyone loves the sound the guns make with the Lonex high speed gears and A1 Titans on 11.1V LiPos.