Excellent condition 16" A2 upper in 300 Whisper/300 Fireball. Barrel is marked "SS 300 FB". This is in 1/8 twist, which is ideal for subsonic rounds. This has a pistol length gas tube, which is preferred for running under all conditions. Previous owner shot about 200 rounds, I haven't shot it and am abandoning my suppressor project. No bolt, carrier or charging handle included. SOLD!!
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