I call it Giles Corey

The manual didn’t say anything about it being so dang heavy. ZPAP M90 with a Zeiss 1-4 and a Polonium 30. It has a 5 position gas plug from yamahawarrior89 and it’s very well gassed and soft shooting on the lowest setting. I was able to shoot some groups with it today (5 shots/100yd) and I was surprised how well it did with 77gr.