Dead Foot Arms Modified Cycle System AR-Pistol Kit 9mm Black Nitiride Bolt Carrier Group BCG Plunger Buffer Tube Black Anodized. It includes: Buffer Tube and End Cap Assembly MCS 9mm Bolt Carrier Group BCG finished in Black Nitride end plate with QD port plunger and recoil and buffer spring. Specifications for Dead Foot Arms Modified Cycle System 9mm AR-Pistol Kit w/Bolt Carrier Group (BCG): Manufacturer: Dead Foot Arms Color: Black Anodized Finish: Nitride Fabric/Material: Steel Gun Make: AR Platform Gun Model: AR-15 Caliber: 9mm Luger Additional Features: Right Folder Condition: New Weight: 1.99 lb Country of Origin: USA Features of Dead Foot Arms Modified Cycle System 9mm AR-Pistol Kit w/Bolt Carrier Group BCG: Black Nitrided Spinta Precision 9mm BCG Type III Anodized Aluminum and Tool Steel made in specialized factories Package Contents: Dead Foot Arms Modified Cycle System 9mm AR-Pistol Kit w/Bolt Carrier Group What firearm models does the manufacturer say Dead Foot Arms Modified Cycle System 9mm AR-Pistol Kit w/Bolt Carrier Group (BCG) is compatible with? The manufacturer says that Dead Foot Arms Modified Cycle System 9mm AR-Pistol Kit w/Bolt Carrier Group (BCG) is compatible with AR-15Dead Foot Arms 78721: Modified Cycle System AR-Pistol Kit 9mm Black Nitiride Bolt Carrier Group Plunger Buffer Tube Black Anodized