TacStar's brass catcher is the perfect accessory for AR shooters who Reload. No more walking around bent over trying to find where your brass flew! the brass catcher simply clamps to the Picatinny rail of flat top AR's. No firearm modifications are needed. The mounting bracket is adjustable and low profile, so it can be positioned to clear optics or scopes. The heat resistant catch bag can hold up to 120 223 cases. When you are ready to empty the bag, simply pull it off of the mounting rail and dump out the shells! the bag also can be unsnapped from its aluminum deflector plate for thorough cleaning features: - clamps to Picatinny rails on flat top AR's - no modifications needed - shell bag pulls off mount for easy emptying - low profile and adjustable - holds up to 120 .223Rem cases - heat resistant bag specifications: - color: black - material: nylon..