The X-Runner piston according to Omer is much more brittle since it's machined instead of being molded, it has a higher failure rate. They've received several guns back with broken X-Runner pistons already, 5 of them already. Two of the pistons actually had the steel base dislodged from the rest of the piston and were lodged in the mechanism still causing accidental misfires and the other two actually were broken in half. Having said that if I were you I wouldn't put it in my gun. The newest version of the Sporasub piston I told you about over the phone is much smoother and isn't hampered by the tail of the shaft like the previous version. Friction issue is therefore addressed.
Sent to me from Mark at Omer US
As I mentioned we can't fix it for you if you don't send it to us.
Sent to me from Mark at Omer US
As I mentioned we can't fix it for you if you don't send it to us.