Product Description The Stern Defense 015SD15INCHMOD5MLOK161 is a complete .45 ACP upper assembly built for AR-style pistol-caliber builds, combining a durable 16.1-inch black Melonite barrel with a rigid 15-inch M-LOK free-float handguard for modern accessory mounting. The upper receiver is constructed from 7075-T6 aluminum with an anodized finish and comes assembled with a dust cover and forward assist. This upper includes Stern Defenses Glock-cut bolt, an enhanced charging handle, and an SD CB45 compensator brake to help deliver reliable operation and improved control. Product Highlights Complete Stern Defense .45 ACP upper assembly for AR-style pistol-caliber platforms 16.1-inch black Melonite barrel for durability and corrosion resistance 15-inch M-LOK free-float rail for lightweight, versatile accessory mounting Includes Stern Defense Glock-cut bolt and enhanced charging handle 7075-T6 aluminum anodized upper receiver with dust cover and forward assist installed Specs Brand: Stern Defense Manufacturer Part Number: 015SD15INCHMOD5MLOK161 UPC: 850001176064 Caliber: .45 ACP Barrel Length: 16.1 in Barrel Finish: Black Melonite Receiver Material: 7075-T6 Aluminum Receiver Finish: Anodized Handguard: Stern Defense 15 in M-LOK rail (includes barrel nut and mounting hardware) Included Components: Assembled upper receiver (dust cover, forward assist), SD BU45 Glock-cut bolt, SD CH1 enhanced charging handle, SD CB45 compensator brake 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.