The NBS AR-15 Upper is a stripped M4 flattop style receiver. The upper starts as a 7075 aluminum forging and is precision machined to Military specifications. After machining is complete the upper is finished with a Type-3 Mil-Spec anodizing. This upper is stripped, and does not include the forward assist assembly or the dust cover assembly.
Technical Information:
- M4 Flattop
- 7075 Aluminum Forging
- Type-3 Mil-Spec Anodizing
- M4 Feed Ramps
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