Amazon.com : 320 FPS AEG M4 Airsoft Rifle Electric Gun w/Triple Shot Launcher & Hi Capacity Magazine : Sports & Outdoors
Double Eagle Full Size M4 RIS AEG w/ Underbarrel M203 Shotgun Launcher – Airsoft Atlanta
Why did the US military get rid of the M203 grenade launcher? - Quora
Are 'grenade launchers' (such as the M79) in handgun or long gun configurations legal to own and/or carry? Are they a good self defense weapon? - Quora