This is the Orthos Arms 12 Gauge 20 Round Drum Magazine.
NOTE: Last round hold open will not function using this magazine on AR12s and N4s
COMPATABILITY
- Fits Orthos Arms Black River Shotguns
- Many other similar patterned magazine fed Shotguns (Charles Daly Magazine Fed Shotguns, EAA MKA 1919, SDS Radikal, Rock Island VR80, Panzer Arms BP12, etc...)
