If you have any questions, do not use this product, and contact us for clarification.

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Grunt-M 5.56 

What ammunition should I use?

You can use almost any newly manufactured non-corrosive factory ammunition as long as it is 5.56mm on down as defined by NATO standards in size, velocity, energy, and pressure, and is the correct ammunition for the firearm. Do not use ammo that is damaged, or is possibly compromised. DO NOT USE HANDLOADS.  If you have any questions, contact us for clarification before use.

Example of ammunition that you can use:

• 5.56
• 22 ARC
• .223
• .22-250
• .22lr
• .22mag
• 17.hmr
• 5.7×28

Do not use any ammo over 5.56mm as defined by NATO standards in size, velocity, energy, and pressure. Do not use reloaded ammunition.

Example of ammo that CANNOT be used:

• DO NOT USE 6.5 Creedmoor 
• DO NOT USE 6MM
• DO NOT USE 6ARC
• DO NOT USE .243