Trigger does not reset forward without assistance - Mimtac AR-15 Mil-Spec Trigger

Had a gunsmith install who showed me how the trigger did not reset fully without being pressed forward. He surmised that in time as it wore in, the mim metal part would improve. Break was fine, trigger acceptable but decided to replace with a Timney also from Optics Planet. Had seen this item get positive reviews so I purchased it on basis of other peson's comments. Inexpensive so you get what you pay for but better triggers are on the market.