Mas, Took your advice and picked up the M&P 340. Excellent carry gun to back up my G19. What are your thoughts on the ct laser for carry? I may be wrong, but I didn't think you installed one on your 340. If you did, what model would you carry on it. The LG 405 looks appealing with the boot grips. Is an on /off switch necessary? They make a lesser expensive laser with no switch. I thinks its the LG 105. Thanks for your thoughts.