BCM® KMR Barrel Nut Wrench (and M4 stock)

MSRP: $19.00
Your Price: $14.95
(You save $4.05 )
SKU:
BCM-KMR-BNW
Stock Status:
This barrel nut wrench is for your KMR barrel nut. This is for hobbyist install.


This wrench also works for your M4 Lock Nut (Castle type).

1/2" drive.


Like all BCM® products, made in USA (410 Stainless Steel).
***This product contains chemicals/materials known to the State of California to cause cancer and other reproductive harm. To learn more, visit www.p65warnings.ca.gov.***

61 Reviews

  • 5
    Awesome wrench!

    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.

  • 5
    This purchase, any BCM purchase - 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.

  • 5
    Well built and easy to use.

    Well built and easy to use.

  • 5
    BCM KMR Barrel Nut Wrench

    Item as Described

  • 5
    Works better then a $60 armorers wrench

    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

  • 5
    Amazing tool at a great price

    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.

  • 5
    Good wrench

    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.

  • 5
    Wrench attachment

    Great product for a great price

  • 5
    simple, sturdy, effective

    Did what I needed it to. Is very solid and appears like it will last.