WMD Guns AR-15 .300 Blackout 16in Free-Float M-LOK Complete Upper Assembly Compensator NiB-X Nickel Silver. They have united metallurgists chemists gunsmiths and plating engineers to establish one of the top firearm coating companies in the industry. WMD Guns products are the outcome of that collective expertise. They sell whole firearms chassis and individual components that they produce and plate in-house as well as offerings from other top manufacturers. Many of their selections are made to order. Specifications for WMD Guns AR-15 .300 Blackout 16in Free-Float M-LOK Complete Upper Assembly: Manufacturer: WMD Guns Caliber: .300 AAC Blackout Barrel Length: 16 in Firearms Threads Per Inch: 5/8x24 Handguard Type: Free-Float Muzzle Device: Yes Finish: NiB-X Color: Nickel Fabric/Material: 7075 T6 Billet Aluminum Gun Rail: Free Float M-LOK Gun Type: Rifle Gun Make: AR Platform Gun Model: AR-15 Barrel Material: 4150 Chrome Moly Vanadium Gas System Type: Direct Impingement Bolt Carrier Group Included: MIL-SPEC Charging Handle Included: MIL-SPEC Magazine Included: No Features of WMD Guns AR-15 .300 Blackout 16in Free-Float M-LOK Complete Upper Assembly: Forged AR-15 Upper Assembly Package Contents: WMD Guns AR-15 .300 Blackout 16in Free-Float M-LOK Complete Upper Assembly What firearm models does the manufacturer say WMD Guns AR-15 .300 Blackout 16in Free-Float M-LOK Complete Upper Assembly is compatible with? The manufacturer says that WMD Guns AR-15 .300 Blackout 16in Free-Float M-LOK Complete Upper Assembly is compatible with AR-15WMD Guns 1-NIBXUA300BO-16: AR-15 .300 Blackout 16in Free-Float M-LOK Complete Upper Assembly Compensator NiB-X Nickel Silver