DERYA MK12 DRUM MAGAZINE 21 RND

Derya MK-12 12-Gauge 21-Round Drum Magazine – DED055039

High-capacity drum magazine for compatible Derya MK-12 shotguns. Its nominal 21-round capacity allows longer shooting sessions with fewer magazine changes.

A transparent rear cover provides a quick visual indication of the shells remaining inside the drum.

Key Features

• Designed for compatible Derya MK-12 shotguns
• Nominal 21-round capacity
• 12-gauge/12-76 specification
• Detachable drum-magazine design
• Transparent rear cover
• Allows a visual ammunition check
• Suitable for competition and range use
• Compact drum shape compared with a long extended box magazine

Product Specifications

Specification	Details
Product Code	DED055039
Brand	Derya
Compatible Platform	Derya MK-12
Product Type	Detachable drum magazine
Gauge	12 gauge
Chamber Specification	12/76
Nominal Capacity	21 rounds
Empty Weight	Approximately 1,136g
Rear Cover	Transparent polymer
Finish	Black
Quantity	One drum magazine

The 21-round capacity, 12/76 specification, approximate 1,136g empty weight and transparent rear cover are confirmed by a European Derya product listing. Derya MK-12 drum specifications

Compatibility

Primarily designed for compatible:

• Derya MK-12 shotguns
• Selected Derya box-fed 12-gauge models using the same magazine interface

This drum must not be assumed to fit every Derya, MKA-pattern, AR-style, or Turkish box-fed shotgun.

Before ordering, confirm:

• Exact shotgun make and model
• Magazine-well dimensions
• Magazine-catch position
• Feed-tower design
• Presence of an external magwell
• Shell length used in the firearm

Important Magwell Warning

The manufacturer-related listing states that this drum is not suitable for shotguns fitted with a magwell unless the internal dimensions are altered.

Modification is not recommended without written manufacturer guidance. Do not force the drum into the magazine well. Have compatibility checked by a qualified gunsmith before purchase or use.

Capacity Notice

The stated capacity is nominal. Actual capacity can vary according to:

• Shell length
• Crimp style
• Cartridge construction
• Internal drum tolerances

Never force additional shells into a full drum. Excessive pressure can damage the ammunition or magazine mechanism.

Loading and Use

Follow the loading sequence supplied by Derya. Do not rotate, wind, release, or disassemble the drum unless instructed by the manufacturer.

After inserting the drum, pull down gently to confirm that it is securely locked. Stop using it if it does not seat correctly or causes repeated feeding problems.

Safety

Unload the shotgun completely before fitting, removing, cleaning, or testing the drum. Remove all ammunition from the work area during maintenance.

The buyer is responsible for complying with all local laws and restrictions relating to firearm magazines and magazine capacity.

Package Contents

• 1 × Derya MK-12 12-gauge 21-round drum magazine

Please Note

The shotgun and ammunition are not included. Product appearance and minor design details may differ between production batches.

This item may require special ordering. Estimated procurement time is 3–10 working days, subject to supplier availability. Stock levels may change hourly. A money-back guarantee applies if the correct magazine cannot be supplied.