MER5007186 – Merkel RX Helix 5-Round Magnum Magazine for 7mm, .300 and .338
The Merkel MER5007186 Magazine is a genuine five-round detachable magazine for compatible Merkel RX Helix rifles in the designated 7mm, .300 and .338 magnum calibre group.
Its five-round capacity provides additional ammunition availability compared with the standard three-round magazine. It is suitable as a replacement or spare magazine for hunting, range use and other lawful sporting applications.
Key Features
- Genuine Merkel RX Helix magazine
- Designed for the applicable magnum calibre group
- Five-round cartridge capacity
- Detachable design
- Suitable as a replacement or spare magazine
- Designed for secure cartridge retention
- Supports dependable feeding in compatible RX Helix rifles
- Durable construction for regular field use
Product Information
- Manufacturer: Merkel
- Part number: MER5007186
- Product type: Detachable rifle magazine
- Rifle platform: Merkel RX Helix
- Capacity: Five rounds
- Calibre group: Selected 7mm, .300 and .338 magnum chamberings
- Rifle and ammunition included: No
Important Compatibility Information
The abbreviated supplier description does not provide the complete cartridge names. Possible chamberings may include 7mm Remington Magnum, .300 Winchester Magnum and .338 Winchester Magnum, but exact compatibility must be confirmed using the rifle’s model, full calibre designation and serial number before ordering.
This magazine must not be described as compatible with every 7mm, .300 or .338 cartridge. Cartridges within these calibre groups can have significantly different dimensions and are not interchangeable.
Only use ammunition that exactly matches the calibre marked on the rifle’s barrel. Check applicable hunting and firearm regulations, as magazine-capacity restrictions may apply.
Compatibility may vary according to calibre, rifle configuration and production year. Product appearance may differ slightly from the displayed image.

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