4.5 bb I don't need. All full blow back. Glock 17 gen 4 -co2 -metal slide -original paper work and back straps Kikimora hi cappa -c02 -fits with most other hi cappa parts(src valken ect.) Kl92 -co2 -no decocker on safety (factory) -mag leaks from flow valve If you have any questions or would like to see them in action let me know.