Well i don't get it...are these just HL tanks that have some mods done to them?
Or are they 100% new tanks?
Also on the air guns i suspect a stock unit just with a tighter bore would give you the 20FPS readings... If you do not mind me asking just what type of chrony did you use for your tests and what type brand of 6mm ammo... as i read all over that some chronies are way off and not acurate at all... I would like t to know what was used for the 170FPS tests if you don't mind..