Sidewinder – ZERO degree Multi-Caliber Two-Round Rail Mount

The KMRNL ZERO Sidewinder is a two-round cartridge holder that mounts directly to an M-LOK rail. Its true zero-degree orientation keeps cartridges parallel with the rifle for a clean, low-bulk profile and secure access when you need a spare round.

Key Benefits

• True zero-degree orientation — Cartridges sit parallel with the rifle for minimal profile.
• Direct M-LOK mounting — Attaches solidly to M-LOK slots with included hardware.
• Two-round capacity — Secure spare ammunition within easy reach.
• Left- or right-side installation — Mount on either side of the forend to match your setup.
• Reinforced polymer construction — Durable build with all required M-LOK hardware included.

Cartridge Compatibility

Optimized for 6.5 Creedmoor. Also compatible with:

• .308 Winchester
• 7mm-08 Remington
• .243 Winchester
• .260 Remington
• .22-250 Remington
• .25-06 Remington
• 6mm Creedmoor
• .270 Winchester Short Magnum
• .300 Savage
• 6.5×55mm Swedish Mauser

Cartridge retention may vary by case dimensions and ammunition manufacturer. Confirm fit before field use.

Best For

Hunters, precision-rifle shooters, and competition shooters who need secure spare cartridges on the rifle.

Included

• One KMRNL ZERO Sidewinder
• Required M-LOK mounting hardware

Add a secure, accessible two-round cartridge holder to your M-LOK rifle setup.