Today I tried taking out the trigger by removing those pins. I tried everything and they won't move. Also I replace the stock battery w/ a 9volt, the recharge one is 8.4volts; I think I noticed some some better response, hard to tell.
there's only one pin you need to take out to remove the trigger. you have to use a center punch and you gotta do it from the correct side. But why do you want to remove the trigger anyways? you can do all the adjustments to it without doing so.