Yeah, as the topic says.... I installed this Systema red polycarbonate piston in my CA M15 rifle about a month or so ago. It was test fired a few times to chorny the gun. I ended up using the gun at a game 2 weeks ago, and it probably saw 200-300 rounds at most that day.
Today, I installed a new Deepfire tightbore barrel I ordered, and wanted to chrony the gun. On my second shot in semi-auto, I heard an odd sound. The third shot, I heard a snapping sound, and no shot. Pulling the trigger again, I could hear the motor and gears turning, but no piston action. I had a feeling that the piston had somehow failed on me.
So I opened up the gun to find that the 3 first teeth were already showing significant wear, and a the piston had broken. The gun is loaded with a Prometheus MS110SP spring and fires in the 350-360 fps range, so it's not like it's not like it's got a super-heavy spring or anything like that.
Well, needless to say, I'm disappointed. I fired 20 000+ rounds with the stock CA piston, and it's not showing the slightest bit of wear on its teeth, and this "top-of-the-line" piston wore out and broke in no time at all. Let's just say I won't be buying Systema pistons anymore.
So for now, I replaced the piston with a stock TM piston I had lying around, and the gun works great again, shooting consistently at 360-ish, so it's not a problem (nice to have spare parts lying around). But I won't be making the mistake of buying a Systema piston again.
