My M5E1 upper is missing the barrel nut wrench
Your M5E1 Upper Receiver is not missing a wrench. No special barrel nut wrench is required or included with the Aero Precision M5E1 Upper Receiver. What wrench does the M5E1 use? The Aero Precision M5E1 Enhanced Upper Receiver is designed to work with a standard AR-15 armorer's wrench. Because the handguard mounti…
03-Jun-2026
