Guarder Reinforced High Speed Ball Bearing Aluminum Piston Head for Airsoft AEG

"Hey guys so used this for my new build and it works fantastic!
Here is the parts list, I mostly used guarder for everything except for a few things.
This compression set works great together!
SHS green nozzle
Guarder piston head, sp120 spring, cylinder head, advanced tappet plate, cylinder head
Bolt ported piston

"Excellent job Guarder! Superb air seal and fps boost. Would buy again. Fit into my KA M1a1 Thompson like a dream. Thanks Evike and Guarder!

"The Good: Shiny, pretty, tough aluminum, perfect seal on my stock cylinder for my JG G36(DMR version) version 3 Gearbox, really helps compress that air very well. Must have.

The Bad: None

The Ugly: None

"Great piston head. Aluminum design means it won't break (as easily) and the ports allow better air flow into the cylinder. The O-Ring it came with is AMAZING for compression.

"High quality piston head. I had no idea how to put on the bearings, but still operates without them.

Pros:
- Made from aluminum, much more durable than plastic ones.
- Ported
- Good O-ring
- Comes with ball bearings (didn't install mine, D:)

Cons:
- None to list.

5/5

"Perfect piston head for a perfect price.

I've shot over 15,000rds on this head, running 470 FPS at 22BB/s.

It'll last you, Well worth it.

Very satisfied.

"What can I say? I've beat the crap out of this piston head with an M125 shooting 400-415 FPS @ 900 RPM and it continues to hold up after 20k rounds. It will probably outlast everything else in my gearbox. Buy it.

"Second Review:

So with this Piston Head, an M140 spring, and 100% upgraded/replaced internals and a compression spread of +/-4 total, I was pushing about 440 FPS with .43g BBs(Madbull).

This combined with a W hold bucking, incredible. It was hitting targets fast, small spread, and consistency.

Unfortunately, the Piston Head somehow tore/snapped away from the Piston's Hold and the entire Piston Head assembly(screw+mount+ballbearings). What's weird is it seems to have just had some kind of suction going on, or something, and it just pulled the screw right out of the piston head - destroying many threads and essentially "totaling" it. The screw was fine, but the inner threads of the piston head were decimated.

What's super weird, is no matter what piston head I use(I've tried lonex, hawk double oring, and matrix now), they don't compress as insanely well as the Guarder did. I'm not sure if it has a special o-ring, or something outside of the standard #14 that most piston heads come with or what... but I'm getting 330 FPS maximum now.

Amazing piston head overall, but it snapped for some reason. So I'm rescoring it to a 4 out of 5, only because of that and really not even know what truly caused it to behave so poorly after maybe 1000 rounds.