Quote Originally Posted by T 20 View Post
Could you weigh the remains of the piston to give me an idea of the overall weight of the alloy piston, please --- the gun serial number would also be useful.

I have heard of the 55 having a steel and aluminium piston before but never come across one.




All the best Mick
Went to try and my scales are dead, so ordered some batteries and will have a go over the weekend.

However the serial number is 744907, and yes it is in a match stock as on page 1.

Cleaning everything up it might not actually be the threads or pin that have failed, but in-fact spot welds. If they failed the end of the the tube would have opened up over the pin and thus the head separated. The front of the tube has been machined down as well, presumably as it now runs on the 'O' ring and doesn't need the tiny swell at both ends, only at the back.