Used to tighten the Carbine Buffer Tube to the Lower Receiver, the US Military has used two different versions.
- Lock Ring- original Style, used on XM177's, early Carbines, etc. Long out of production so this is a difficult item to find. Needs the Lock Ring Wrench for tightening (Here)
- Castle Nut- replaced the Lock Ring (above) and is still the current style. Typical for later model Colt Commando's and M4's. Many AR tools have a solution for tightening this castle nut.. there is a Castle Nut Wrench (Here)
Made in the USA
It's the Real Deal
Perfect, exactly what I was looking for.
Receiver extension rare lock ring
Dimensions are era correct. Other than the color being slightly darker, you can’t tell the difference between original.
perfect for replacement on a colt
used this to replace the consistently walking locking ring on a Colt SMG (9mm, so hard recoil in the AR platform). it is functionally perfect and even has the color correct!
Perfect part for my Vietnam era colt build. This is the only site that has it in stock.
buffer tube nut
a great part, so hard to find for a Retro build!