Home / Gun Parts / Guntec Usa / Guntec USA AR-15 Complete 5.56 Upper Receiver w/o Lower Parts Kit N.3 15in Air-Lok M-Lok Handguard MLS Gen 2 Stock Assembly Carbine Length .750 Gas
Guntec USA AR-15 Complete 5.56 Upper Receiver w/o Lower Parts Kit N.3 15in Air-Lok M-Lok Handguard MLS Gen 2 Stock Assembly Carbine Length .750 Gas
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Aug 26, 2026
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Specifications
Brand
MPN
AR556KIT3
Description
Guntec USA AR-15 Complete 5.56 Upper Receiver w/o Lower Parts Kit N.3 15in Air-Lok M-Lok Handguard MLS Gen 2 Stock Assembly Carbine Length .750 Gas. 2 15in Ultralight M-Lok HandguardMLS Gen 2 Stock AssemblyCarbine .750 Gas Block16in 5.56mm 1:7 Twist M4 4150 Barrel N.2 is a great way to create a short compact and lightweight upper. This complete upper comes complete with everything you need to complete your upper build. The Upper Receiver that comes with the GUNTEC USA AR-15 Complete Kit features a 556 Barrel 556 Complete BCG 556 Ejection Door Assembly 556 Charging Handle 556 Complete Lower Parts Kit and a 15in Handguard so you can build the upper yourself. However you will need a lower to complete the gun. Specifications for Guntec USA AR-15 5.56 Upper Receiver w/o Lower Parts Kit N.2 15in Ultralight M-Lok HandguardMLS Gen 2 Stock AssemblyCarbine .750 Gas Block16in 5.56mm M4 4150 Barrel 1-7 Twist: Manufacturer: Guntec USA Caliber: 5.56x45mm NATO .223 Remington Barrel Length: 16 in Gas System Length: Carbine Length Barrel Twist Rate: 1-7 Muzzle Device: A2 Flash Hider Gun Model: AR-15 Fabric/Material: 4150 Chromoly Steel Handguard Length: 15 in Gun Rail: M-LOK Gun Make: AR Platform Magazine Included: No Condition: New Additional Features: No Lower Parts Kit Included Accessories: Steel Low Pro .750 Gas Block 5.56 Upper Receiver 1/2 x 28 A2 Birdcage 5.56 Complete BCG 16 inch 5.56mm 1-7 Twist M4 4150 Barrel 1/2 x 28 Crush Washer Carbine Length Gas Tube 5.56 Complete Lower Parts Kit Forward Assist Asssembly 5.56 Charging Handle 5.56 Ejection Door Assembly Features of Guntec USA AR-15 Complete 5.56 Upper Receiver w/o Lower Parts Kit Everything included except the lower. Kit Does Not Come Assembled. Package Contents: Guntec USA AR-15 Complete 5.56 Upper Receiver w/o Lower Parts Kit 5.56 Upper Receiver 5.56 Complete BCG 5.56 Ejection Door Assembly 5.56 Charging Handle Forward Assist Asssembly 5.56 Complete Lower Parts Kit 15" Ultralight Series M-LOK Handguard With Barrel Nut & Hardware (GT-15MLK) AR-15 "TAP" Tactical Assault Pistol Grip (ARGRIP-TAP) AR-15 MLS Gen 2 Stock Assembly (MLS-G2) Carbine Length Gas Tube Steel Low Pro .750 Gas Block 16" 5.56mm 1:7 Twist M4 4150 Barrel 1/2 x 28 Crush Washer 1/2 x 28 A2 Birdcage Guntec USA AR556-KIT-3: AR-15 Complete 5.56 Upper Receiver w/o Lower Parts Kit N.3 15 inch Air-Lok M-LOK Handguard MLS Gen 2 Stock Assembly Carbine Length .750 Gas Block 16 inch 5.56mm M4 4150 Barrel 1-7 Twist 1/2x28 A2 Birdcage Black
