A versatile 40mm Gas Grenade in the form of the HK-style M320 A1 is now available at JK Army. Made by Iron Airsoft, this can be used as standalone launcher as it comes with a stock or you can detach the stock and mount it under your assault rifle provided that it supports such. It would be great if it's mated to an HK416 AEG or Gas Blowback rifle. Price is US$235.00 and 40mm Gas Grenade Shell needs to be purchased separately.