
Product 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.
Item Details
UPC: 051497297985
Manufacturer Part Number: ULT0116
Caliber: 5.7X28MM
Billet: No
Barrel Length: 16"
Receiver Size: AR-15
Stripped: No
Color: Black
GFID: a0454350-47c0-4d1e-9b5c-5fe7cf8320ca
Ultralight Tactical AR-15 Complete Upper
AR57
AR57 Ultralight Tactical AR-15 Complete Upper Receiver 5.7x28mm 16" Barrel
$811.99 M

Order Quantity
Product 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.
Item Details
UPC: 051497297985
Manufacturer Part Number: ULT0116
Caliber: 5.7X28MM
Billet: No
Barrel Length: 16"
Receiver Size: AR-15
Stripped: No
Color: Black
GFID: a0454350-47c0-4d1e-9b5c-5fe7cf8320ca