AOLS Piston Head Aluminum Precision CNC Machined - Red

Unlike my old piston head, this thing is built very nicely and made of very nice materials. It actually gives me an air seal instead of a piston head. Do not seem to have done much. The only issue I have with it is that assembling it is not easy. An item that goes between a head and a shaft. It is actually three separate pieces that must be held together for it to screw into the bottom piece. The installation of the ring requires the installation of all the other components.

Aden Moss

| Feb 08, 2021

One of the first ones I received had a smaller O ring and only 6 ports, so I believed it was a knock off. As a result of my contact with the merchant, my piston head was replaced for free, and the merchant was very helpful. I've been testing the new one with my DMR build. It seems to be working well. Compression achieved at a high level.

Lorenzo SLATER

| Oct 30, 2020

My colt m4 is much faster with this piston head and built more fps. I recommend getting silicon grease and using something else to grease all gears an moving parts inside the gearbox while it is open because the factory grease I find is way too thick and seem really dry.

Gerardo Davenport

| Jan 24, 2021

It is something that I have used a number I had to replace a piston head screw recently because the screw had stripped out. piston head appears to have failed due to a failure of the threading inside. We do not know what caused the problem. Now that I have the original plastic piston head back in my rifle, everything is working as There might have just been a defect, or it might have just been.

Kamari Buck

| Oct 02, 2020

I can't think of anything that went wrong! I had an explosion in my cylinder because of it. It is crucial that the thing is tightened up, otherwise it will fail.

Marlowe Monroe

| Aug 25, 2020