Versatile, good quality... - Crimson Trace Rail Master Universal Laser Sight w/ CRKT Picatinny Tool

I had this installed already on a Ruger SR22 and a H&K P30 9mm, works/fits perfectly, follow instructions to zero in, no problems there...
The red laser dot visible enough at day light but a green laser dot may be a better option for a very sunny day. Great warranty and customer service, tested them with another laser sight, Crimson Trace are top notch, fast response and great turnaround time on repairs...