Empire BT-4 Combat ERC Black Airsoft Guns The two rearmost o-rings capture

The two rearmost o-rings capture all of the air released and forces it through the bolt to fire the ball

3D EVA Foam molded belt with micro injection rubber logo

shorter dwells

The Cure 4 incorporates a soft leading portion of the bolt that not only reduces the impact on the ball being launched

Empire BT-4 Combat ERC Black Airsoft Guns The two rearmost o-rings captureCompact and durable marker ideal for stealth with offset Slideaway Feedport. In addition to the features below, it also comes with the Rip Clip feed system AND E frame factory installed. For a limited time only, it will ship from PB Sports with a FREE Apex barrel as well! Features: Tournament legal external velocity adjuster Removable grip frame for quick and easy upgrades Easily accepts expansion chambers, vertical and horizontal bottle adapters