Product Name:FTK Full Tune-up Kit - Ver.2/Ver.3 Speed16.32 / S100+ 　Smooth16.32 / S100+ Modular Gear Set with Tempered Stainless Bushes(Double Oil Grooves) + Cyliner + Piston head 　 　 　 　+ Stainless Bushes + Cylinder head + Anti-reversal Latch + Tappet + Rotary spring guide + Piston 　 　 　 　+ Nozzle + Spring + Synthetic Lubricant with PTFE FTK-01S　　Full Tune-up Kit for M16-A1/V (Speed 16.32 / S100+) FTK-02S　　Full Tune-up Kit for M16-A2 (Speed 16.32 / S100+) FTK-03S　　Full Tune-up Kit for G3-A3/A4/SG1 (Speed 16.32 / S100+) FTK-04S　　Full Tune-up Kit for AK-47/47S (Speed 16.32 / S100+) FTK-05S　　Full Tune-up Kit for AUG (Speed 16.32 / S100+) FTK-06S　　Full Tune-up Kit for XM177-E2 (Speed 16.32 / S100+) FTK-07S　　Full Tune-up Kit for M4-A1/RIS/SR16 (Speed 16.32 / S100+) FTK-08S　　Full Tune-up Kit for SIG551 (Speed 16.32 / S100+)---------with SMOOTH Gear Set FTK-09S　　Full Tune-up Kit for MC51 (Speed 16.32 / S100+) FTK-10S　　Full Tune-up Kit for SIG552 (Speed 16.32 / S100+)---------with SMOOTH Gear Set FTK-11S　　Full Tune-up Kit for G36C (Speed 16.32 / S100+) FTK-12S　　Full Tune-up Kit for CAR15 (Speed 16.32 / S100+) FTK-13S　　Full Tune-up Kit for MP5-A4/A5/SD5/SD6 (Speed 16.32 / S100+) FTK-14S　　Full Tune-up Kit for MP5K/PDW (Speed 16.32 / S100+)---with SMOOTH Gear Set   Inquiry