This wrench also works for your M4 Lock Nut (Castle type).
1/2" drive.
Like all BCM® products, made in USA (410 Stainless Steel).
I bought this wrench to tighten the buffer tube castle nut on my AR. The BCM wrench locks up tight on the castle nut and works great.
I love the BCM KeyMod Rail system. Thought I'd add an extra wrench to the AR tool box. These things work great for the buffer tube castle nut too.
Well built and easy to use.
Item as Described
Works better then a $60 Brownells armorers wrench That I bought online from Brownells for torquing down my buffer tube castle nut and is even a tighter fit then the spikes tactical castle nut tool I bought as well! All in all haven't used it on a bravo company barrel nut but for what I originally bought it for which was the castle nut it works great! It Works as good as my magpul armorers wrench but does not have the buffer tube limitations like the magpul wrench has on pistol buffer tubes
I bought this tool to remove a current KMR barrel nut to replace it with the V7 titanium KMR barrel nut and this tool made it very easy at an affordable price.
It was a good tool that I used for building my lower.
The castle nut got locked down smoothly.
Just what needed. Reasonable price.
Keep up the good work.
Great product for a great price
Did what I needed it to. Is very solid and appears like it will last.