AR/M4 Receiver Extension Buffer Tube Lock Ring "Castle Nut"
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This is a Mil-Spec steel "castle nut" for locking the AR/M4 carbine's receiver extension/buffer tube in place.

Made in the USA!

  • Item #: ARBufferTubeLockCastleNut

AR/M4 Receiver Extension Buffer Tube Lock Ring "Castle Nut"

Price: $4.99
2 or more: $4.74 each
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