I received this alon with a few other upgrades (Systema Cylinder Set)
After many hours of troubleshooting I finally figured that this piston did not want to move in the gearbox, it actually was VERY tight.
Solution: I took some sandpaper and a dremel and made the rails on the piston lower and widened them a bit.
I have a CA Reinforced Ver. 2 Gearbox.
This was definitely quite irritating, because after 3 hours I thought it was my shim job, nope that was flawless; it was the piston!
Now I'm sure this is an isolated incidient, and having to modify it wasn't that big of a deal.
For newer players trying to install this in their gearbox they might have some troubles if they run into the problem I did.
I'm giving this piston a 4/5 because the quality and strength of this piston is superb, but the little annoyance of not being able to plug and play sets it back 1 star.
- Increases RoF
- Less damaging to the GB than an alluminum piston
- Light in weight
- Pretty expensive
- Had to modify the piston to make it work
Rating: [4 of 5 Stars!]