The Rock River Arms LAR-15M NM A4 is a complete AR-15 upper in 223 Wylde (for 5.56mm and 223 Remington) with a 20 inch 1:8 twist stainless heavy match barrel, a 12.5 inch free float M-LOK handguard, a gas block sight base and an A2 flash hider. It includes a bolt carrier group and charging handle.
- Manufacturer Part # : AR0784
- Type : Complete Upper Receiver
- Caliber : 223 Wylde
- Barrel Length : 20"
- Barrel : Heavy Match Stainless
- Handguard : 12.5" Free Float M-LOK
- Muzzle Device : A2 Flash Hider
- Includes : Bolt Carrier Group, Charging Handle
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