Psionic Upgrades THO-R hop up bucking set

Hi quality MADE IN ITALY hop up bucking set!
Improved shooting range thanks to the perfect chamber seal!
New soft fabric tested at temperature range from -10 to 30°.
Incredible AEG power range from 0.8 to 2J energy (optimal bbs weight 0.28g).
SMALL and MEDIUM size nubs are included.
Ideal for all kind of aeg barrel except those wioth small hop window (such Lonex, KM etc..)
Please put silicone oil before installation and remove the leavings right after.