The Crimson Trace Laserguard is a compact laser sight. The laser sight attaches firmly around the trigger guard, and features Crimson Trace's famed Instinctive Activation, which allows the laser to be activated by simply gripping the pistol in a normal firing grip. It provides two (2) hours of run time on a single 1/3N battery (provided). Easily user-installed in moments with no alterations to the firearm, the Laserguard is fully adjustable for windage and elevation. This red laser model is compatible with Sig P238 & P938. It will not fit the following: P938 BRG, P238 DESERT, and P938 22LR TB, P938 variant with a wrap-around grip.