Our take: The G&G AEG Power Spring Upgrade M100 Airsoft upgrade spring is made for most-all Airsoft metal gearbox AEGs. Constructed of tempered high-carbon steel wire with a variable pitch, it is one of the best ways to adjust the FPS output of your metal gearbox AEG. The G&G AEG Power Springs are high quality, high strength springs that are built to last and maintain their tension. This is a perfect spring for any CQB AEG, making your AEG CQB field "legal" (most CQB Fields have an FPS limit of 350 with .20g BB's). It is highly recommended when installing an upgraded spring to also install an upgraded metal ball bearing spring guide and metal bushings. FPS rating: 320-340 FPS with .20g BB's
G&G is renowned in the airsoft industry for manufacturing premium quality components and AEGs for a price that won't break the bank!
Disclaimer: Any and all airsoft upgrade parts purchased from Airsoft Megastore will be used/installed at owner's discretion. We are not responsible for any damage that may occur. For best results, please have a professional airsoft Tech install all upgrade components at a certified professional airsoft technician/shop.