HK Army Expand Backpack Shroud Black/Green Eclipse CS1 Grip Kit The smaller o-rings are mainly

The smaller o-rings are mainly for older generation guns

ours is completely rebuildable with drop in parts

Dual SFR Bolt Speed Controls

Uses two CR123A batteries

Breach Sensing Technology: Increases the valve closing speed

HK Army Expand Backpack Shroud Black/Green Eclipse CS1 Grip Kit The smaller o-rings are mainlyHK Army Expand 35L Backpack Shroud Black Green Grab your gear and go with the all in one Expand Gear Bag Backpack designed with the paintball athlete in mind this versatile bag can be carried like a duffel or strap it on your back for the ultimate paintball gear bag backpack. The Expand Gear Bag capacity can be increased by 30% by simply fully opening the bottom compartment. The exterior side pockets have molle webbing for additional attachment