Not sure if this is the proper place for it, but they are essentially an integral part of the gun when installed. I like the LaserMax replacement recoil spring/spring rod. A buddy of mine has these on his 26, 27, AND his 30. All are great subcompacts and having the laser shooting right out from under the barrel without taking up space on the outside of the gun sounds very appealing to me. I like the help in shooting while adding the old drama of a red dot on my target.