a burst charge can or cup DEEP crimped over, a rimmed brass base/ wad / <br />plug, holding the primer all combined to power the flight of tear gas & Grenades <br /><a href="http://archive.ph/5BxPy" target="_blank" rel="nofollow">http://archive.ph/5BxPy</a> <br /><a href="http://archive.ph/OCez6" target="_blank" rel="nofollow">http://archive.ph/OCez6</a><br /><a href="http://archive.ph/CZS1U" target="_blank" rel="nofollow">http://archive.ph/CZS1U</a><br /><a href="http://imgur.com/a/p0ltbep" target="_blank" rel="nofollow">http://imgur.com/a/p0ltbep</a><br />...<br /><a href="https://www.youtube.com/watch?v=U3Q5vqY-2x0" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=U3Q5vqY-2x0</a>