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, Pre-Ban
- FNH Magazine FN P90, PS90 5.7x28 FN 10-Round Polymer Clear... $24.00 Out of Stock, Backorder OK
- Butler Creek Sidewinder Tactical Flip-Up Lens Cover Black... $9.31 - $14.99 Select Options
- Millett Compact Red Dot Sight 1" Tube 1x 3 MOA Dot with... $59.99 Available
- Tuff Products 5-In-Line Magazine Pouch AR-15/Magpul Nylon... $47.99 Out of Stock, Backorder OK
- 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
- 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.
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