hopup packing 65' (blue)
magazing type spring
H-HOPUP
6.04 inner barrel 230mm MP5A4/A5/S
6.04 inner barrel 248mm car15/P90/5
6.04 inner barrel 301MM THOMPSON
6.04 inner barrel 364MM M4/SIG551/X
6.04 inner barrel 456mm AK47/S/74/10
6.04 inner barrel 470mm G3/G3SG1
6.04 inner barrel 510mm M16/AUG/24
6.04 inner barrel 591MM PSG-1
6.04 inner barrel 494mm G36