An AR-15 castle-nut / stock-combo armorer's wrench for buffer-tube (receiver-extension) work. The wrench engages the castle nut to lock it against the end plate and provides a stock-hardware surface for seating carbine stocks during install or removal.

Features:

• Castle-nut surface for the receiver-extension lock
• Stock / buffer-tube wrench surface for carbine stock hardware
• Steel construction — durable for repeated armorer use
• Sized to standard mil-spec AR-15 carbine hardware

Compatibility: Use with a standard mil-spec AR-15 carbine receiver extension. Confirm the wrench matches your hardware profile before applying torque; commercial-spec end-plate hardware may sit differently than mil-spec. Not sized for AR-10 castle-nut hardware.