Kennesaw Cannon Company .45Colt/410 Gauge Barrel Insert for 26.5mm Flare Guns, Legally Shoot .410 Bore Shotshells and .45 Colt Ammunition In European Flare Guns [FC-ZWA-622] - Cheaper Than Dirt
26.5mm Supplies — Skylighter, Inc.
Gardena Accessory Adapter Eur.Ean 26.5 MM (G 3/4") (02921-20)
GARDENA - Accessory Adapter 26.5 mm (G¾")
Havoc 26.5mm Flare Adapter
Runway Sub-Caliber Adapters for 26.5mm Flare Guns
37mm to 26.5mm Cartridge Adapter
Kosher Surplus - We are restocked on 37mm to 26.5mm adapters! https://www.koshersurplus.com/product/37mm-to-26-5mm-cartridge-adapter/ | Facebook
Flare Gun Adapter For 26.5 MM To 12 GA Bitcoin - Other Gun Accessories & Parts at GunBroker.com : 1029855727