This M4 barreled upper assembly is complete and ready for you to add your choice of optics or rear sights. The highly accurate 16" M4 profile barrel is chrome lined and machined from 4150 chrome moly vanadium steel rifled 1 x 9" right hand twist. An A2 flash suppressor and standard A2 front sight are fitted.
The machined aluminum flat top upper receiver is complete with:
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