▼ 5% below avg
AR57 Ultralight Tactical AR-15 Complete Upper Receiver 5.7x28mm 16" Barrel
Lowest Listed Price
$649
MSRP
$740.99
Savings
12% off
Retailers Reporting In Stock
3 Stores
Updated
Aug 26, 2026
Compare Deals from 8 Retailers
Sorted by lowest price
Specifications
Description
The AR57 Upper Receiver Assembly converts an AR-15 to shoot 5.7x28 FN ammunition. The unique upper design loads on top and accepts FN PS90 magazine (not included) and ejects downward through the AR-15 magwell. This upper is precision machined from a one piece aluminum forging. Forged from one 7075 T6 Mono bloc Aluminum, called a Kryptonite Mono bloc with a Black Melanite Treatment Finish.
