MR556/HK416 20-Round Steel Magazine

This is an HK-listed 20-round steel magazine identified for compatible MR556 and HK416 applications. This page provides neutral capacity, caliber and compatibility information for accurate identification.

MR556/HK416 20-Round Steel Magazine specifications and reference details

• HK part number/SKU: 233609S
• Referenced platform: HK MR556 and HK416 applications identified by HK
• Caliber: 5.56 x 45 mm
• Capacity: 20 rounds
• Material: Steel
• Component type: Detachable magazine

HK lists this item in its rifle-parts magazine inventory. Confirm the current catalog description through the official HK Rifle Magazines catalog.

Model compatibility and related magazines

Compatibility should be confirmed using the complete HK part number, platform, caliber and current manufacturer documentation. Similar appearance or shared caliber does not establish fit. Related references include MP7A1 40-Round Magazine, UMP9 30-Round Magazine, MP7 30-Round Magazine, and MR556/HK416 20-Round Steel Magazine. Browse Rifle Magazines or return to Rifle Parts.

Identification considerations

Check the body markings, caliber, stated capacity, follower and floorplate configuration, and HK part number 233609S. Do not use a magazine that is damaged, altered or not positively identified for the host firearm.

Safety and lawful possession

Keep the firearm unloaded while confirming fit and follow the current operator manual. Magazine-capacity and possession restrictions vary by jurisdiction; verify applicable federal, state and local law before acquisition, possession, transport or use. Inspection of a damaged or uncertain magazine should be performed by the manufacturer or a qualified firearms professional.

Common MR556/HK416 20-Round Steel Magazine questions

Is this magazine compatible with every firearm in the same caliber?

No. Magazine fit depends on the exact platform, magazine interface and manufacturer specification.

How is the capacity identified?

Use the catalog description, body markings and HK part number rather than appearance alone.

Can local capacity restrictions apply?

Yes. Capacity, possession and transfer rules vary by jurisdiction.