Just got an Avenger .25 non BP and scope height is great on that. Shooting MOA with pellets and 1.5 MOA with slugs but still working on slug tuning. $350 for the AVA, $165 for the Vortex scope, $175ish for the DonnyFL adaptor and mod, $285 for the Yong Heng compressor and $?? For an assortment...