Empire BT-4 Combat Black Internal Marker Upgrades New water resistant system is

New water resistant system is great for out door play scenario games and can change modes on the fly

The ability to change your dwell and spacer combo allows the marker to be super snappy

premium durability and versatile functionality

accelerating it to speed and guiding it on target

improving performance at every level - guaranteed to UPGRADE your gun's engine

Empire BT-4 Combat Black Internal Marker Upgrades New water resistant system isCompact and durable marker ideal for stealth with offset Slideaway Feedport. Features: Tournament legal external velocity adjuster Removable grip frame for quick and easy upgrades Easily accepts expansion chambers, vertical and horizontal bottle adapters Works with CO2 or compressed air Stainless steel bottomline Impact resistant baked on coating Dual Picatinny mounting rails meet Military Standard 1913 Modular trigger system 1 year full parts and