Sig Sauer MCX Virtus 11.5" Complete Upper Receiver Assembly
This Sig Sauer MCX Virtus complete upper is built around an 11.5" barrel and a full-length Picatinny top rail. The forend is a Midwest Industries free-float M-LOK handguard for accessory mounting and airflow.
Configured as a complete upper receiver group with bolt carrier group and ambidextrous charging handle installed, and fitted with a 3-prong flash hider.