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Guarder SP150 Infinite Torque-Up Kit for M4 Series Airsoft AEG

1 Customer Review

by David J. on 10/22/2008
"hey there,
i just bought this item and i have to say, you are going to need a good amount of time to install this if you are going to do this alone. Every part in the tune up kit is great, but you have to make a modification on your gearbox to install the gears correctly. you have to cut part of the semi auto catch on the inside of the gearbox, and you have to make it long enough to keep your trigger assembly to be in tact when using semi auto, but you have to cut it short enough to let the gears spin. i learned the hard way and cut too much of the gearbox thing off, and now my semi does not work. so i suggest that you should take it slow if you are going to do it yourself. i guess i will try to use some sort of melted metal to recreate that little piece that does so much. so if your planning to buy, keep this little piece that you have to modify in mind.

Overall good tune up kit.