TM m870 Gas Shotgun- converted to hpa with extended tightbore barrels.
The onyl skirmishable shotgun i have used, most are just novelties.
Needed a stronger valve return spring or else the shotgun does not work.
Fixed hop up means this gun loves .25g bbs. With this set up it goes an effective 150 ft.
It is a blast to use and I use it as a primary. Takes cheapo springer tri shot shotgun shells.
Six shot mode has diminished range and uses a lot more gas but in cqb it is brutal.
Wii tech upgraded barrels provide a tighter grouping and more range. Also the barrel spacers make the gun much more sturdy.