This is one of the key upgrades that you should buy for you impulse first. It is very easy instalation really nice looking. And above all else very very very fast. It has 3 adjustment holes to adjust the trigger just the way you want it. It It is the most cheapest way to make your gun very very fast.
In conclusion this trigger is very fast and cheap. I would recomend this upgrade to anyone with an impulse. And to make it really fast take out your spring in the trigger frame.