Please email us at techsales@opticsplanet.com regarding your question.
The Precision Reflex Barrel Nut Wrench might work with that barrel nut. However, from I recommend contacting Black Rain Ordnance to confirm compatibility or find information on a compatible barrel nut wrench.
I took a chance and bought one. It measures 1.31". It is designed for a standard AR15 type 20 notch barrel nut. Excellent quality. It fits my Proof Research carbon fiber barrel.
This is not compatible with the Sig M400 Tread.
This will fit AR-15 barrle nuts and will not work with the M5E1 BAR barrel nut.
This will fit AR-15 barrel nuts and will not work with the M5E1 BAR barrel nut.
This will fit AR-15 barrel nuts. Fitment with Aero Precision will be dependent on the Aero Precision barrel nut you are using. Most Aero Precision barrel buts require a proprietary barrel nut wrench.
This should work for F-1 P7 and C7 barrel nuts.
These are made in the US by Precision Reflex themselves.