THIS IS NOW NYLON GEARBOX ..YES!!
These are built from the ground up, purely from parts and are always built to order. We spare nothing.
FOR M4A1 GEN 9, ACR GEN 10 (COMES WITH NEW GRIP AS WELL FOR GEN9)
HARDENED GEARS, ALLOY CYLINDER HEAD AND ALLOY NOZZLE
310+ FPS ...IT WONT LEAVE HERE UNTIL IT SCORES OVER 310FPS ON OUR CHRONO (normally around 315fps)
NOW WITH special red cylinder and full metal rail piston and alloy head (way smoother operation and less stress on gearbox and increase performance)
THIS IS A COMPLETE GEARBOX PACKAGE READY TO USE AND SPORTS THE "WOW FACTOR" BEAST SEAL OF APPROVAL
COMES WITH M4A1 GEN9 WIRING LOOM AND BARREL
THESE ARE VERY LIMITED (built to order)
Brand new GEN9 , 10 GEARBOX + MUTLI UPGRADE PACK (2 x UPGRADE PACKS) + FULL INSTALLATION AND TESTING OF BOTH UPGRADES PRIOR TO SENDING
PERFECT FPS RANGE: 310+
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# UPGRADE PACK 1 (1.3mm SPRING, ADC BEAST hopup, ALLOY BARREL 33.5cm ,T-PIECE)
# HULK UPGRADE PACK (UPGRADED 460 LONG MOTOR, FULL METAL GEAR SET, UPGRADED PISTON + O'RING)
# ALLOY CYLINDER HEAD + ALLOY NOZZLE
# STAINLESS STEEL RETURN SPRING
# BEARINGS X 6
# SHIM KIT X 1
# FULLY INSTALLED, TUNED AND TESTED TO BE A BEAST BY BEAST TECHNICIANS
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