Lima Six Review: 2,000 Rounds With a Belt-Fed AR-15 Upper

Summary

This article reviews the Lima Six Belt Fed Upper Receiver for AR-15 platforms after 2,000 rounds of testing. Developed from an AR15.com forum concept in March 2024 to a production unit by December 2025, the upper is chambered in 5.56X45mm NATO and features an 18-inch chrome-lined barrel, midlength gas system, and uses M27 5.56 links and M249-style drums.