JavaScript seems to be disabled in your browser. You must have JavaScript enabled in your browser to utilize the functionality of this website.
$150 Rebate - Walther PPK/S
Shop Popular AR-15 RiflesSHOP NOW
Shop Popular HandgunsSHOP NOW
Shop AllIn Stock AmmoSHOP NOW
Limited Edition "Alien Green" 30 Round AK-47 MagazineGET YOURS
Filter By
PW Arms AR57 LEM Gen2 Complete A-3 Upper Assembly, 5.7x28mm, 16", With 50 Rd Magazine
Be the first to know when this product is back in stock!
AR57 16" Complete SLC M-LOK Upper receiver 5.7x28 w/1-50 rnd mag
CMMG Banshee 300 MK57 Complete Upper Receiver Group Kit 5" Barrel 5.7X28 - Includes (3) 40rd Magazines - 54F18E9
AR57 50rd Polymer Magazine for PS90/AR57 Rifle Uppers, Translucent Black
CMMG 57BA8AEAB Dissent MK4 5.7x28mm 6.50", Left Side Charging Handle, Armor Black, OEM Zeroed Linear Comp, 4.60&quo
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!