IMG AR-10 .308 12 Gauge 19in Complete Upper Receiver w/Two 5 Round Magazine Black. This powerful and versatile combination allows you to experience the performance of a 12-gauge shotgun with the familiar AR-10 platform. Crafted with precision and durability this upper assembly is designed for reliability and ease of use. Specifications for IMG AR-10 .308 12 Gauge 19in Complete Upper Receiver w/Two 5 Round Magazine: Manufacturer: IMG Caliber: 12 Gauge Overall Length: 27.5 in Barrel Length: 19 in Muzzle Device: Threaded Color: Black Fabric/Material: Steel Handguard Length: 14.5 in Gun Rail: M-LOK Gun Type: Rifle Gun Make: AR Platform Gun Model: AR-10 Weight: 5.45 lb Condition: New Magazine Included: Yes Mount Type: Picatinny Attachment Type: Picatinny Features of IMG 12 Gauge Upper Receiver For AR-10 .308 Lower Receivers w/ Two 5 Round Magazines Works on DPMS style platforms Compatible with Most DPMS Gen1 pattern 308 lowers Choke Threaded Muzzle with screw on thread protector Package Contents: IMG AR-10 .308 12 Gauge 19in Complete Upper Receiver w/Two 5 Round Magazine 2x 5 Round Magazine What firearm models does the manufacturer say IMG AR-10 .308 12 Gauge 19in Complete Upper Receiver w/Two 5 Round Magazine is compatible with? The manufacturer says that IMG AR-10 .308 12 Gauge 19in Complete Upper Receiver w/Two 5 Round Magazine is compatible with AR-10IMG AR0110-5RD: AR-10 .308 12 Gauge 19in Complete Upper Receiver w/Two 5 Round Magazine Black