AR57 Generation 2 Upper Assembly AR-15 5.7x28mm FN 1 in 8 1/2" Twist 16" Fluted Barrel Chrome Moly with Free Float Quad Rail Handguard, Flash Hider,
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- Upper Receiver: A3 Flat-Top
- Barrel Length: 16"
- Barrel Contour: Fluted, heavy
- Barrel Material: 4140 Chrome Moly Steel
- Muzzle Thread Pattern: 1/2"-28
- Chrome Lined: No
- Barrel Finish: Parkerized
- Twist Rate: 1 in 8.5"
- Chamber: 5.7 x 28mm FN
- Bolt Carrier: Commercial
- M4 Feed Ramps: N/A
- Muzzle Device: A2 Flash Hider
- Gas System Length: Carbine
- Gas Block Diameter: 0.750"
- Handguard: Free-Float Quad Rail
- Sights: None
- Extras: Single Rail Gas Block
Please Note: Installation of AR-15 upper assemblies with certain features including, but not limited to: flash hiders, bayonet lugs, and threaded muzzles may violate state and/or local laws.
Shipping Weight: 4.800 PoundsXThe total weight of the product, including the product’s packaging as it sits on our shelf. Since some products ship directly from the Manufacturer, their weight may be unavailable. Because of variations in the manufacturing process, similar products may have differing weights. Unless the product is designated as “Ships Alone”, Shipping Weight does not include the shipping box or packing materials associated with your order.
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