HM Defense HMB-AR15 HMB Drop-In Bolt Assembly 223 Rem,5.56x45mm NATO Black Nitride
- SKU: HMBAR15
- UPC: 854164007135
- Model: HMB
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HM Defense's HMB is constructed of 9310 steel with a black nitride finish, chrome bolt finish and comes with a Cam pin.
| Manufacturer | HM DEFENSE |
| Pricing Unit | EA |
| Model | HMB |
| UPC | 854164007135 |
| SKU | HMBAR15 |
| Width | 3.9000 |
| Length | 4.8000 |
| Height | 1.1000 |
| Weight | 0.1550 |