see below

Well this project took a new step. I had an opportunity to fit the action into a divine walnut bullpup stock made by Wingman. So he modified the scope mounts for me and I am waiting for it to arrive back this week. Here's a photo he sent me. see photos below It's totally reversible too, so if I so d...

Yes hard to imagine that valve spring not being there. I would imagine you're wasting a lot of air. Is your transfer port clear? Is there a spacer between the reg and brass pot?

Fair call. I was thinking about one of Robert lanes videos about what to adjust and thought it might help as I thought he mentions something like this.

Here's a thought. If you in fact increased the reg pressure, it would mean more pressure on the valve, so harder to open, which could effect less power at the muzzle. I might be totally wrong, but try reducing reg pressure.

Haha, thanks ten metre. Well, to cut a long story short, I've had a great result with my reg install. I will give you the summarised version as I know I'm not breaking any new ground here, but what I've done is repeatable and you certainly don't need great skills to do this. Started with an S510, FA...

And thanks Tonyc, if i get some more bushes I might try the fac hammer again. It just occured to me that when I weighed the hammers, one had the bushes and the other didn't. So maybe they are the same weight, but one longer.

Well I got the sleeve out and into the std hammer. Just testing to see if this works for the photo. [imghttps://i.imgur.com/Q154ESH.jpg/img]

Didn't know about them. Just had a look though and which hammer is for FAC and which is for 12 ft/lb? Not being able to post pictures makes it hard. The one in my gun is shorter with a broader striking end, where the std striker from knibbs is longer, and striking face much slimmer. Any tips on how ...

I am regulating my S510 carbine. it's an FAC .177. I ordered a lighter spring and std hammer off John Knibbs. When I compared the hammer that came out of my gun with the std one they were different. The std one was longer, and felt heavier, which in my mind would lend towards more power. I want to s...