I bought a CM9 and decided I wanted to add a laser. After putting 2 or 3 hundred rounds down range to break her in and get comfortable, I installed the Crimson Trace LG-437.
The install went pretty easy and the laser worked very nice as I practiced for a couple of days Dry Firing. On to the range.....
I get all set up with my allen wrenches to sight in the laser and fire a couple shots adjusting the beam closer to the center and then no laser ? After checking my grip with not firing and making sure that it was not a case of missing the button with my fingers, I continue to empty the mag and the last shot the laser is back on. So I clear the gun and get the supplied Q-tips out and wipe the lens and try the laser with the empty gun again and all is good. Load up and shoot again. Looks good so I shoot a few more adjusting and I get it where I'm putting em in the red. Then it happens again no laser ! I decide to just get some practice with the gun sights.....for the rest of my visit the laser would work/not work and then it got real dim but would stay there ( not bright enough to be seen outdoors). Seems that when I pointed it it would flash brite for a nano second then dim. The guys at the LGS had not seen this and said that CT was very reliable......maybe a new battery.
A call to CT and describe the symptoms and they agree to send a replacement laser.
Installed the new laser and back to the range.......4th shot in .....no laser....couple more laser .....couple more DIM LASER...........sh!t !
I shoot enough to site in the beam and leave. What are the chances that 2 lasers have the same problem? Maybe CT has a batch of bad batteries ? After reading everything i can find, (noone has claimed to have this problem ) I'm determined to find the answer.
So I'm headed back to the range with (1) New battery (2) Q-tips w/alcohol (3) different brand of ammo.
Without changing the battery or cleaning first, I dry fire the gun and good laser ...loadup with new ammo and shoot......perfect ........could it be the ammo? 50 or 60 rounds thru.. perfect no problems ?? Ok I"ll load the original ammo......perfect ...... shoot the remaining 30 rounds of this ammo and then all of ammo#2 and no problem ????
I dont know where I'm at........but I love this gun and like the laser, but dont trust it.