TacFire Official AR15 Castle Locking Nut for .223/5.56 Rifle carbine stock used to tighten buffer tube to receiver.
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| Material: | Steel |
| Width: | 2.50" |
| Weight: | 0.50 oz |
| Firearm Fit: | AR-15 |
| Color: | Black |
| Length: | 1.375" |
| Model: | Castle Nut |