This CO2 gun offers great quality and excellent shooting performance. Several different options are available for the user's convenience: scope sights, lasers and lamps that can be easily mounted and removed. All guns include an accessory picatinny rail. BBs are loaded through a loading port on the top side. Call Toll Free 800.726.1696 if you have additional questions, our knowledgeable staff is standing by between M-F 9am - 5pm EST or email at staff@compasseco.com .