Quote Originally Posted by TonyL View Post
P.S. Norm, most people would go for a guide that is a nice, firmish, sliding fit to reduce twang. Not so tight that you have to hammer it in, though. The diameter you mention may be a little loose? But, if you don't mind going "old school", moly grease will help dampen the twang. Plus that extra length will help.

I'm guessing you may have to go for the original type of guide fitting, ie into the end block, as a guide with a flange at the rear may not allow the piston to come backwards by the required mount to allow cocking? You'll need to have a little play to see if this may be the case. If a design with a flange would work, you'd need a wider diameter delrin bar to start with, larger diameter to suit the cylinder ID and the smaller diameter to suit the spring ID. Does the piston have a latch rod or does the trigger sear engage with a cut-out in the piston body?
Hi Tony,
Yes I was going to try both sizes I’ve ordered ( 10mm & 12mm ) and see which works best in terms of slideability

When I said a flange, I got that slightly wrong, I meant I was going to cut the old guide off flush with the end of the plug then if say the 12mm rod is suitable I’ll drill an 10mm hole in the plug and machine the end of the rod to slightly bigger than that so it’s a tight push fit in the plug

I’m assuming it’s best to still use moly grease on the spring to make it slide over the guide even easier.

The trigger sear engages with the piston body directly.

Just got to wait for the rod to arrive, should be here anytime after Friday this week.

Norm