This AR15 Complete Upper features a 20" 5.56 Rifle Length Barrel w/ Pinned FSB and Magpul MOE Rifle Length Handguard Specifications for Aero Precision AR15 20in 5.56 Complete Upper Receiver with Flash Hider w/Magpul MOE Handguard: Manufacturer: Aero Precision Cartridge: 5.56x45mm NATO Overall Length: 30 in Barrel Length: 20 in Barrel Profile: Government Gas System Length: Rifle Length Muzzle Device: A2 Flash Hider Gun Model: AR-15 Condition: New Handguard Length: 12 in Gun Make: AR Platform Included Accessories: None, Standard Weight: 62.67 oz, 70 oz Magazine Included: No Country of Origin: USA Features of AR15 20in 5.56 Complete Upper Receiver with Flash Hider w/Magpul MOE Handguard Upper: Standard AR15 Upper Receiver Barrel: 5.56 Barrel w/ Pinned FSB Handguard: Magpul MOE Handguard Muzzle Device: Standard A2 Flash Hider