Modify X-RANGE Hop-Up Rubber TM GBB/VSR 70 Degree

New design released November 2019!
Minor modification of your inner barrel window is required (see video below), or use with the pre-modded Modify X-RANGE stainless steel tightbores.



70 degree rubber is suitable for pistols and VSR-10 sniper rifles shooting over 350 fps.
For Marui GBB pistols / VSR-10 and compatible clones