Product Description Upgrade your AR-15 build with the Spike&';s Tactical Midlength Complete Upper in 5.56x45mm NATO. Built around a tough 7075-T6 forged aluminum upper receiver, this 16-inch assembly is inspected and prepared for immediate use right out of the box. It arrives complete with a phosphate-coated bolt carrier group (BCG) for corrosion resistance and long service life, plus a 12-inch Picatinny-style handguard for versatile accessory mounting. Finished in black and topped with an A2 flash hider, this complete upper assembly is designed to deliver reliable function and smoother cycling with its mid-length gas system. Product Highlights Complete 16" 5.56x45mm NATO upper assembly for AR-15 platform builds and upgrades 7075-T6 forged aluminum upper receiver for strength without excessive weight Mid-length gas system designed for reliable cycling and a smoother shooting impulse Includes phosphate-coated bolt carrier group (BCG) for improved corrosion resistance 12" handguard with Picatinny-style mounting space plus A2 flash hider Specs Brand: Spikes Manufacturer Part Number: STU5035CQ2F UPC: 810083260563 Platform Fit: AR-15 Caliber: 5.56x45mm NATO Barrel Length: 16" Gas System: Mid-length Twist Rate: 1:7" Muzzle Device: A2 flash hider Muzzle Thread Pattern: 1/2"x28 Handguard Length: 12" (SAR3 noted by distributor listings) Receiver Material: 7075-T6 aluminum Receiver Finish: Black anodized Barrel Material: Chrome Moly Vanadium Barrel Finish: Black phosphate Included: Bolt carrier group (phosphate-coated) Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the products manufacturer.