Midwest Industries Upper Receiver Group 16 inch Barrel .223 Wylde 15 inch Combat Series M-LOK Handguard Mid-Length A2 Flash Hider Black. Specifications for Midwest Industries .223 Wylde Upper Receiver w/Combat M-LOK Handguard: Manufacturer: Midwest Industries Caliber: .223 Wylde .223 Remington Barrel Length: 16 in Gas System Length: Mid Length Barrel Twist Rate: 1-8 Color: Black Gun Model: AR-15 Condition: New Gun Rail: M-LOK Magazine Included: No Model: M-LOK Country of Origin: USA Features of Midwest Industries .223 Wylde Upper Receiver w/Combat M-LOK Handguard: Forged 7075 T6 Aluminum Upper. Hard Coat Anodizing. T-Markings on Receiver. 16 inch Lightweight Melonite Finish Barrel. 1/8 Twist. Chambered in .223 Wylde. Threaded 1/2x28. .625 Gas Block Diameter. M4 feedramps. Mid-Length Direct Impingement Gas System. MI A2 Flash Hider. Package Contents: Midwest Industries .223 Wylde Upper Receiver w/Combat M-LOK Handguard What firearm models does the manufacturer say Midwest Industries .223 Wylde Upper Receiver w/Combat M-LOK Handguard is compatible with? The manufacturer suggests that Midwest Industries .223 Wylde Upper Receiver w/Combat M-LOK Handguard is compatible with AR-15Midwest Industries MI-N16CRM15-U: Upper Receiver Group 16 inch Barrel .223 Wylde 15 inch Combat Series M-LOK Handguard Mid-Length A2 Flash Hider Black