Ergo Castle Nut, works with Commercial, Military & Hybrid Buffer Tubes Fits: AR-15 and all AR Variants
Ergo Castle Nut Features:
| SKU | 4971-(B) |
| Manufacturer SKU | 4971-(B) |
| Length | 0 |
| Width | 0 |
| Height | 0 |
| Weight | 0 |
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