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Description
Rock River Arms complete Tactical Carbine upper is an A4 upper chambered in .458 SOCOM with a 16" chrome moly bull barrel and 1:14 twist. Additionally the upper comes with a complete bolt carrier group, charging handle assembly, 15" RRA lightweight M-Lok compatible free float rail and a RRA Operator brake with a a 5/8-32 thread pitch.
Features :
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Features :
- .458 Socom Chamber
- 16-Inch Chrome Moly Bull Barrel, 1:14 Twist
- RRA Operator Brake / 5/8–32 Thread
- Low Profile Gas Block
- RRA Lightweight Free Float Rail, 15 Inch Extended
- Bolt Carrier Group And Charging Handle Assembly
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