I own a CM9 and decided to put the Crimson Trace LG-437 Laserguard Red Laser Sight on my pistol. The first one had issues with the up/down adjustment so ordering through Amazon was an easy return. The second one came and the damn thing would not keep a zero anywhere you set it, ugh! Needless to say it was returned yesterday and my account was credited $198.86. I had one other dealing with Crimson Trace. The same issue with up/down adjustment on a Springfield XDS Mod 2 OSP 9mm. The pistol came with a Crimson Trace 1500 red dot. It was returned to Crimson Trace and they sent another in its place, no questions asked. Just wondering if anyone else has ever had issues with there Crimson Trace toys?