do you mean these?
if so ? nope dont own this particular brand.
its nothing more than a release trigger. you squeeze.. it fires... you release.. it fires. 1 shot per each action.
so whats your problem?
the most common problem is being too quick on the release. you have to give it that split second of time to grab the edge, so that then it can release it... if not? then it will just hammer follow & not shoot. which is what its supposed to do.