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Guarder SP120 Full Tune-Up Kit for M4 / M16 Series Airsoft AEG

1 Customer Review

by Derek S. on 06/19/2015
"I bought this kit to upgrade my G&G CM 16 raider L. I was hoping this kit would make things easy but easy isn't always best. I read another review on the M4 version of this kit stating it came with type "0" instead of the type 1 that it's supposed to. I decided to try this version instead. Guess what...type "0" in this kit too. It usually isn't a big deal to drill your own holes but with a plated cylinder such as shouldn't because smoothing the inside burs left from drilling will damage the plating inside. I will say the cylinder is more solid and feels smoother inside than the one in my G&G.

The spring guide is of good quality as is the piston and cylinder head (with some modification to holes that seat it properly).

The piston head, although ball bearing, is average at best. I decided to use my piston head along with the ball bearing from this one.

As others have stated, the gears are sub-par. They won't be replacing G&G's hardened steel gears I already have...a waste there.

Tappet plate and nozzle are basically the same as factory no upgrade there.

The bushings are useless in a version 2 gearbox as most have at least 7mm or more. 8mm steel should be offered. Mine has 9mm copper as I learned.

I should have done my homework before pulling the trigger on this kit. Better parts can be purchased for the same price if not cheaper.