Multi-function, push button tactical tailswitch Optimized electronics provide regulated beam intensity Grooved barrel adapts to long gun mount Upgrade Kit for the Streamlight Strion LED. Upgrades?existing?Strion C4 LED to 260 lumens. (This kit does not upgrade a xenon bulb flashlight?to LED.)table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }