AR57 AR-15 Generation 2 A3 Upper Receiver Assembly 5.7x28mm FN 16" Barrel
- 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
- 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
- Bolt Carrier Assembly Included: Yes
- Bolt Carrier Type: N/A
- 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.
Thank you! Your valuable input helps improve our product information and future product selections
DPMS Lower Receiver Parts Kit AR-15...
$65.99Sale Save $7.00 (10%)
DPMS AR-15 Takedown Pin Punch Delrin...
AR57 Magazine FN P90, PS90, AR57 5.7x28mm FN Polymer Smoke...
$38.99 - $46.99
FNH Magazine Pouch FN PS90/P90 Nylon Black...
- Leupold VX-2 Rifle Scope 2-7x 33mm... View More Options
FNH Magazine FN P90, PS90 5.7x28 FN Polymer...
Add to Cart for PriceSale — Select Items
Leupold Rifleman Rifle Scope 2-7x 33mm Wide Duplex Reticle...
$179.99 & SHIPS FREESale Save $20.00 (10%)
RCBS Shellholder #45 (5.7x28mm FN)...
Federal American Eagle Ammunition 5.7x28mm FN 40 Grain Full...
$24.99 - $229.99
American Trigger Corp. AR Gold Trigger Unit AR-15 Small Pin...
$249.99Sale Save $34.00 (12%)
RCBS 2-Die Set 5.7x28mm FN...