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Factory NIB 6" AR 57 Upper 1/2x28 Thread for your suppressor Have a Factory SD. NO Suppressor comes with this setup it is shown only for how upper looks with one.
GEN2/LEM Complete Assembly with 6" Fluted Barrel, Standard 1/2 X 28 threads, Semi Auto Bolt, and 4.9 oz "Carbine" Buffer. Comes with Ambidextrous Mag Release & Charging Handle. This unit accepts muzzle devices / suppressors 1.25" in diameter or less (to fit within the hand rails).

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