The term "AR platform cartridges" generally refers to the various types of ammunition that are compatible with the AR-15 or AR-10 platforms, which are popular modular rifle designs in the United States. Here is a list of some common cartridges associated with AR platforms: ### Common AR Platform Cartridges: 1. **.223 Remington** 2. **5.56x45mm NATO** 3. **.204 Ruger** 4. **6.5 Grendel** 5.
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