Beeman Beeman underlever 1358 mods

Hey everyone I've been messing with my Beeman. It's my first PCP. I'm an engineer and a tinker so I've taken it apart a few times and made some changes.

I opened up the main valve and made that spring a decent amount weaker. Right now I want to get a little more power. I also added a o ring in the block before the hammer which takes off some for but helps with hammer bounce. Over all I still get 50-60 shots but my curve isn't as flat as it was with the stock valve spring. I also recommend removing the brass washer on the valve spring to make it a little softer. It's STIFF.

My main struggle is that I can't get a reg to work on my model because of where the pressure gauge is. Does anyone know where I could source a gauge block? I would also accept a drop block to add a bottle of anyone can help me source one.


I would also love to find some barrels that fit this receiver. I'm sure a few models work, but I don't know where to buy them.


I've been 3d printing some mods. This one has lasted the longest so far.

But I'm trying some. Resin printer parts too.

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