The ready to be tapped for HPA use JAG Arms TS Scattergun is available at Airsoft Atlanta... "The new 2017 Jag Arms TS Railed version Scattergun Gas Shotgun in Black. This is a green gas powered airsoft shotgun, with an internal buffer tube (integrated) tank reservoir that holds many shells worth of gas. The Jag Arms shotgun is a 1:1 clone of the original Tokyo Marui M870 from Japan. Most internal/external parts and shotgun shells should be compatible with this model. The TS has a retractable M4 style rear stock.

Featuring a tri-shot blast from each pump and trigger pull, it has 3x barrels from which it fires from. It's very cool! Easy to pump and fire. You can select between firing 3 shots and 6 shots per pump/trigger pull, just like the Tokyo Marui. Gun is mostly all metal with plastic furniture on where it should be.  Smaller metal top rail for added sights and accessories. Very solid and hefty!  Comfortable and easy to pump action.

FPS is around 340 FPS w/.20g BBs (3 and 6 shot tested at this velocity).

Box includes shotgun, 3 red shells, BB speedloader (gas tank is integrated into the rear buffer tube). Can use optional Tokyo Marui and UTG/Double Eagle 3-shot shells (compatible). Can use Airsoft Innovations propane adapter kit. Can also use HPA tapped valves."