When it comes to flashlights, lasers and weapon lights, no one does it better than SureFire. SureFire is trusted by military and police personnel all over the world. This SureFire A12 Lithium Battery Adapter is designed so you can increase the number of batteries on your P6 or L90 module lights. The adapter fits between the weapon light body and the tail cap. Since it's from SureFire, it is made from aircraft grade aluminum and finish in mate black.