Tokyo Marui M870 Shotgun Spare Gas Tank. The spare tank fits in the back stock of your Marui 870 gas shotgun, so you're never without spare gas on the field. It's quite a heavy little tank too, built of quality metal in Japan!
- Tokyo Marui M870 Shotgun Spare Gas Tank
- Fits the Marui 870 shotgun only
- To use fits in the rear stock compartment
- Made in Japan