Airsoft Dual Bore Barrel ??

I never heard of this before, but sounds interesting.  Some say it is a gimmick, but this video is from early 2017 so…

Two Show Guns Tactical 20mm Grenade Launchers!

Show Guns Emergency Shotshell Carrier with 20mm Grenade Launcher https://www.evike.com/products/83416/ Features Nylon fiber construction Lightweight, and simple to use Fire up to 6…