UPDATE: Note to self: PDI springs have an outer diameter of 9mm. laylax and all others, including stock, have an OD of 7mm. so i had to skip on the cyl set and just buy a piston got it in and...HOLY SHEET! Its beast. My Jing Gong BAR10 G-SPEC is officially a BASR. Nest to come is a TM hop-up chamber. I will post some vid's tomorrow.