4.5″ 9mm Upper Build Kit:
(1) 4.5″ Barrel 1:10 Twist Parkerized (USA Made)
(1) 9 mm Bolt Carrier Group (USA Made)
(1) Slim M-LOK Free Float Handguard 4.25″
(1) Mil-Spec Charging Handle Alum.
(1) Dust Cover
(1) Forward Assist
(1) A2- 1/2″x36 Thread Bird Cage A2 Muzzle Brake
(1) Upper Receiver 5.56/.223/.300AAC, M4 Feed Ramps (USA Made)
WARNING: This Product Can Expose You to Chemicals Including Lead, which is Known to the State of California to Cause Cancer and Birth Defects or Other Reproductive Harm. For More Information go to www.P65Warnings.ca.gov.
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