Machined 1911 frame from https://www.rusticindustrialcustoms.com/ and Hogue Overmoulded grip for a good angle and consistent hand placement, topped with a Holosun HS507C-X2
I’m in the UK so we have the stupid sub6 rule, but it makes 18fpe with the reg set at 125bar and it is very consistent, when I was pellet testing JSB Rs it had a ES of 4fps over a full mag