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!