The TAC21 Tactical is a Gas Sniper Rifle. - The TAC21 Chassis System is CNC Machined from aviation grade Aluminum with Anodized finishing. - CNC engraved TAC21 marking and unique serial number. - One Piece Fluted Outer Barrel is CNC machined from aviation grade Aluminum. - With a top full-length MIL-STN-1913 accessories mounting rail. The built-in mounting rail has 20 MOA (Minutes of Angle) on the action housing and is parallel to the barrel  axis on the fore-end. - 2 pcs of side rail and 1 pc of bottom rail are included. - Steel Flash Hider with military grade surface finishing. - Equipped with Magpul PTS MOE Grip & Magpul PTS PRS Stock. (KA-AG-175-BK/DE)  - Equipped with CAA official licensed CBS+ACP Stock (Collapsible Butt-Stock & Adjustable Cheek Rest) and Enhanced Pistol Grip for King Arms M4 / 9mm GBB series with non-slip ergonomic  designed. (KA-AG-175-BK/DE-V2)  - Compatible with M4 AEG stock & tube. - Compatible with M4 GBB grip.

The TAC21 Tactical is a Gas Sniper Rifle. - The TAC21 Chassis System is CNC Machined from aviation grade Aluminum with Anodized finishing. - CNC engraved TAC21 marking and unique serial number. - One Piece Fluted Outer Barrel is CNC machined from aviation grade Aluminum. - With a top full-length MIL-STN-1913 accessories mounting rail. The built-in mounting rail has 20 MOA (Minutes of Angle) on the action housing and is parallel to the barrel  axis on the fore-end. - 2 pcs of side rail and 1 pc of bottom rail are included. - Steel Flash Hider with military grade surface finishing. - Equipped with Magpul PTS MOE Grip & Magpul PTS PRS Stock. (KA-AG-175-BK/DE)  - Equipped with CAA official licensed CBS+ACP Stock (Collapsible Butt-Stock & Adjustable Cheek Rest) and Enhanced Pistol Grip for King Arms M4 / 9mm GBB series with non-slip ergonomic  designed. (KA-AG-175-BK/DE-V2)  - Compatible with M4 AEG stock & tube. - Compatible with M4 GBB grip.