I prob would not be here if I had a trigger lock on my smith wesson mp 15t rifle. let me lay the story out for you. Rual country, police 20min out, bad guy with mask kicks the door in and wakes me up, just have enough time to get out of bed, grab my rifle from under it, open the door with me almost in my b-day suit, walk 20 ft to the stairs, and point the gun at the bad guy who was already comming down the stairs with weapon in hand... not 5 sec to spare. Thank you dad for teaching me a gun not ready for use is just a stick.