I致e purchased a Leupold red dot to put on my TRP and I知 waiting on the mounting plate to get here from EGW. I think I値l like the site but can稚 seem to find out an accurate estimate on battery life. The site turns on whenever it senses motion so if I知 carrying the gun it値l stay on. This is both my duty and CCW gun, I知 not wanting a surprise finding out the battery life is one week!!! LOL If it is that short I値l probably find a mounting plate to install it on my Bisley 44 special and just hunt with it.