To handle the extra power of LiPo batteries

Inner Barrel: 205mm

Product OverviewIntroducing the HK Army Crash Knee Pad System

giving it a more futuristic and high end look than the standard M4 receiver

SHS High Speed Motor & 13:1 Gear Tune Up Set tracer unit To handle the extra powerThe Complete SHS High Speed Tuning Kit for AEG Version 2 is an all inclusive upgrade kit. The combination of high quality SHS components results in a rate of fire of nearly 23 BBs per second in most AEGs. This kit combines basic components with combined savings: SHS high speed motorSHS 13: 1 gear set with CNC machiningM120 SpringSolid steel 14 tooth nylon piston