Our take: Shims are one of the most essential parts of any gearbox, ensuring proper spacing between gears to protect against wear. This high quality, high-precision JBU shim set is a must have for any serious airsoft technician, allowing you to get the perfect angle of engagement for each gear in any type of gearbox. Properly shimming a gearbox can result in a longer life of the AEG's gearbox, and improved consistency and performance. Re-shimming is recommended to be done only by experienced Airsoft technicians.
Shim Set Includes: 6 x 0.20mm shims, 6 x 0.35mm shims, 6 x 0.55mm shims (18 total)
Disclaimer: Any and all airsoft upgrade parts purchased from Airsoft Megastore will be used/installed at owner's discretion. Actual performance results depend on quality of installation, airsoft AEG barrel length, tightness of the air nozzle seal, and other possible performance-affecting factors. We are not responsible for any damage that may occur with improper installation. For best results, please do all upgrades at a certified professional airsoft technician/shop.