The Derya Firearms D055039 DY12 Drum Magazine 21rds 12 Gauge is a high-capacity shotgun magazine engineered for AR-12–style platforms that accept the Derya DY12 pattern. Built with a durable hybrid construction featuring a polymer drum and steel tower, it is designed to deliver reliable feeding and smooth operation for extended shooting sessions.

This 21-round 12-gauge drum is ideal for range use, training, and recreational shooting where maximum capacity and minimal reloads are desired. The translucent rear cover and hand-crank load assist make it easier to monitor rounds and load efficiently, while the black finish complements modern semi-automatic shotguns. Backed by Derya’s reputation for innovative shotgun designs, this magazine offers a robust, purpose-built solution for shooters who value dependable performance.

Key Features:

• Manufacturer: Derya Firearms
• Model: DY12
• Caliber: 12 Gauge
• Capacity: 21 Rounds
• Color: Black
• Type: Drum Magazine
• Material: Metal / Polymer
• Model Fit: Derya DY12 and AR-12–style shotguns
• Unique Features: Polymer drum with steel tower, translucent rear cover, hand-crank load assist