Modify X-RANGE Hop-Up Rubber TM GBB/VSR 65 Degree

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



65 degree rubber is suitable for most pistols under 350 fps.
For Marui GBB pistols / VSR-10 and compatible clones