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5.7x28 Upper Receivers

8 Product(s)
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AR57 16" Complete ULT M-LOK Upper Receiver 5.7x28 Caliber With BCG, Muzzle Brake, M-LOK Rails and 1-50 Round Mag, Drop In Ready

AR57 16" Complete ULT M-LOK Upper Receiver 5.7x28 Caliber With BCG, Muzzle Brake, M-LOK Rails and 1-50 Round Mag, Drop In Ready
$649 99
In Stock
Only 6 Left!
AR57 12" Complete ULT M-LOK Upper Receiver 5.7x28 Caliber With BCG, Muzzle Brake, M-LOK Rails and 1-50 Round Mag, Drop In Ready

AR57 12" Complete ULT M-LOK Upper Receiver 5.7x28 Caliber With BCG, Muzzle Brake, M-LOK Rails and 1-50 Round Mag, Drop In Ready
$649 99
In Stock
Only 1 Left!
PW Arms AR57 LEM Gen2 Complete A-3 Upper Assembly, 5.7x28mm, 16", With 50 Rd Magazine

PW Arms AR57 LEM Gen2 Complete A-3 Upper Assembly, 5.7x28mm, 16", With 50 Rd Magazine

Out of Stock
AR57 16" Complete SLC M-LOK Upper receiver 5.7x28 w/1-50 rnd mag

AR57 16" Complete SLC M-LOK Upper receiver 5.7x28 w/1-50 rnd mag

Out of Stock
CMMG Banshee 300 MK57 Complete Upper Receiver Group Kit 5" Barrel 5.7X28 - Includes (3) 40rd Magazines - 54F18E9

CMMG Banshee 300 MK57 Complete Upper Receiver Group Kit 5" Barrel 5.7X28 - Includes (3) 40rd Magazines - 54F18E9
Out of Stock
CMMG Banshee 5.7x28mm Complete Upper Receiver, 5" Barrel - Anodized Black - 57BBCF0-AB

CMMG Banshee 5.7x28mm Complete Upper Receiver, 5" Barrel - Anodized Black - 57BBCF0-AB
Out of Stock
AR57 50rd Polymer Magazine for PS90/AR57 Rifle Uppers, Translucent Black

AR57 50rd Polymer Magazine for PS90/AR57 Rifle Uppers, Translucent Black
Out of Stock
CMMG 57BA8AEAB Dissent MK4 5.7x28mm 6.50", Left Side Charging Handle, Armor Black, OEM Zeroed Linear Comp, 4.60" M-LOK Handguard for AR-Platform, Picatinny End Plate

CMMG 57BA8AEAB Dissent MK4 5.7x28mm 6.50", Left Side Charging Handle, Armor Black, OEM Zeroed Linear Comp, 4.60" M-LOK Handguard for AR-Platform, Picatinny End Plate

Out of Stock
8 Product(s)
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Experience the ballistic performance of the iconic FN P90 in the familiar AR-15 platform with a 5.7x28 upper receiver from Classic Firearms. Whether you're looking for a rifle or pistol upper, we've got just what you need to complete your dedicated AR57 build for sale. Buy your next AR57 5.7x28 complete upper receiver online at Classic Firearms!

 
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