Our take: The APS M4/M16 Version 2 polycarbonate hop up chamber is built to withstand the most rugged airsoft conditions while maintaining perfect accuracy. The APS hop up chamber is only compatible with AMA, Javelin, and APS M4 series AEGs, due to the design of their full seal air nozzles. The APS hop up chamber is easy to dial in for perfect accuracy, and features a unique "H" shaped hop up nub for a better BB flight pattern. This hop up chamber, once adjusted, does not jostle itself out of position as similar hop up chambers are likely to do. These hop up chambers can be found in top performing M4 AEGs such as AMA (Airsoft Megastore Armory) and Javelin M4 Series Version 2 gearbox AEGs.
- "H" shaped hop-up nub included
- Quality polycarbonate construction, with high quality hop up gears
- Only compatible with APS, Javelin and AMA M4 Version 2 gearbox AEGs (compatibility with other M4 AEGs is NOT guaranteed)
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.