I love the ergonomics of the gun, but it jammed three times today (I had been using snap caps, and I wonder if they tweeked my ejector. Also, the factory set sights are off (I can see one of the lines in the mounting track). I'm considering a night sight job, should I just ahve the factory install them, or does their version suck compared to whats available? I'm looking for something durable and highly visible. ideas?