Get the edge on your enemy, with some Glow-In-The-Dark Tracer BB Pellets They provide a great alternative to your indoor/outdoor target shooting wars. Because they glow this makes them ideally suited for low light tactical gaming events, you can also see them leave a tracer trail as they fly through the air, but they work best with an add-on tracer unit on your gun. The 0.20g bb pellets Hear our the standard Weight and most commonly used Airsoft bb pellet for most guns on this site and best used with mid to hi-end electric rifles and powerful gas and spring pistols. a rough guide would be for example bb guns that shoot between 210 to 350 fps to use the 0.20g bbs. see our BB Pellet Buying Guide. for more about our tracer bb pellets.