What exactly do you want to drill that you are worried about on the trigger? The tabs that I drilled are a very soft metal. Even if they were steel, a quality bit and some engine oil on a slow speed will go right through. The ONLY time I ever needed a special bit, was when I wanted to drill a hole in an allen key. Those fuckers are forged in a volcano. I bought a carbide bit on amazon and it got the job done though lol.