Meta Tactical PF45 w/Glock 21 Slide Apex Carbine Conversion Kit Black. Designed developed and tested to be the most versatile and innovative conversion kit on the market. Specifications for Meta Tactical PF45 w/Glock 21 Slide Apex Carbine Conversion Kit: Manufacturer: Meta Tactical Chassis Material: Chrome Moly Steel Gun Make: Glock Gun Model: Glock 21 Country of Origin: USA Features of Meta Tactical PF45 w/Glock 21 Slide Apex Carbine Conversion Kit Bullpup design allowing for rapid target acquisition in a compact rifle platform Ambidextrous design with shell deflector ambi mag-release and ambi non-reciprocating charging handle Supports suppressor height sights Compatible with most aftermarket slides as well as optics ready/optics cut slides (without optic mounted) Built-in cheek rest allowing for a consistent cheek weld Compatible with most AR15 flat-top A2 style grips 6-position adjustable stock M-LOK accessory system on handguard with a NATO picatinny top rail Package Contents: Meta Tactical PF45 w/Glock 21 Slide Apex Carbine Conversion Kit 16in Barrel Thread Protector Muzzle Device What firearm models does the manufacturer say Meta Tactical PF45 w/Glock 21 Slide Apex Carbine Conversion Kit is compatible with? The manufacturer says that Meta Tactical PF45 w/Glock 21 Slide Apex Carbine Conversion Kit is compatible with Glock 21Meta Tactical APEX-PF45-BK-21: PF45 w/Glock 21 Slide Apex Carbine Conversion Kit Black