The Radical Firearms complete 5.56 upper is a MIL‑STD compatible upper built for AR-15 style assemblies. It features a 16″ barrel with a 1:7 rifling twist and an M-LOK handguard for modular accessory attachment. This upper is configured for straightforward installation onto MIL‑STD lowers and is intended for range use and finishing a build. The finish is black for a utilitarian appearance.
Key Specifications
- The caliber is listed as .223 REM/5.56 NATO.
- The barrel length is 16 inches.
- The rifling twist rate is 1:7.
- The handguard interface is M-LOK.
- The finish/color is Black.
- This item is a Complete Upper Receiver.
- The product type is Upper.
- Designed to mate with MIL-STD AR-15 lowers.
Practical and straightforward, this Radical Firearms complete upper provides the core features builders and shooters expect: a 16″ 1:7 barrel, M-LOK flexibility, and MIL‑STD compatibility. Its clean, functional layout makes it a solid option for completing a project or updating an existing AR-15 style platform for general shooting and range use.
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