FM Products FM-9 AR 9mm Forward Charging Upper Receiver w/ Micro Brake 9x19mm Parabellum 10 inch 8.5in Barrel Blast Diffuser Black. Built with a host of top tier features these AR15 Upper Receivers created by the experts at Foxtrot Mike Products boast a match-grade 41V50 barrel and an M-LOK compatible handguard for a reliable and aesthetically pleasing shooting experience. This FM Products FM-9 AR 9mm Forward Charging Upper Receiver w/ Micro Brake features an 8.5in barrel with an FM Products Micro Brake (1/2-36 thread). When you upgrade your build with this FM Products FM-9 AR 9mm Forward Charging Upper Receiver w/ Micro Brake your pistol caliber lower receiver will be improved as well. Specifications for FM Products FM-9 AR 9mm Forward Charging Upper Receiver w/ Micro Brake: Manufacturer: FM Products Caliber: 9mm Luger Barrel Length: 8.5 in Threads per Inch: 1/2x36 Muzzle Device: Blast Diffuser Color: Black Fabric/Material: Premium Match Grade 41V50 Gun Rail: Picatinny Gun Make: AR Platform Gun Model: AR-15 Condition: New Barrel Material: 4150 Chrome Moly Vanadium Magazine Included: No Charging Handle Included: MIL-SPEC Mount Type: M-LOK Features of FM Products FM-9 AR 9mm Forward Charging Upper Receiver w/ Micro Brake: Proprietary handguard / upper interlock keeps handguard true to the upper; Premium Match Grade 41V50 Barrel; M-LOK compatible handguard; Complete upper includes bolt carrier group and charging handle; FM Products Micro Brake (1/2-36 thread); Compatible with 9mm Glock magazines Package Contents: FM Products FM-9 AR 9mm Forward Charging Upper Receiver w/ Micro Brake What firearm models does the manufacturer say FM Products FM-9 AR 9mm Forward Charging Upper Receiver w/ Micro Brake is compatible with? The manufacturer says that FM Products FM-9 AR 9mm Forward Charging Upper Receiver w/ Micro Brake is compatible with AR-15FM Products FM9-FS-110: FM-9 AR 9mm Forward Charging Upper Receiver w/ Micro Brake 9x19mm Parabellum 10 inch 8.5in Barrel Blast Diffuser Black