Maybe trigger is in the eye of the beholder ?? but I thought it was great ... could hardly tell it was there ... I had the stock trigger on mine ...
My trigger process for rifles with pistol grips ...
place ball of thumb on rear of pistol grip, directly behind trigger.
place first digit of finger of trigger with a bend which has the rest of the finger slightly forward of the first digit, which is touching the trigger.
tips of other fingers can touch the pistol grip or hang in space.
squeeze from both opposing ends, the ball of the thumb and the first digit of the trigger finger which should be exactly aligned and opposing, until the trigger breaks.
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Just make sure you have a solid position, there is a bit of recoil !
I used the 750gr match ammo from .50bbmgsupply. In case it mattered, when ordering ammo from them, I always specified it was for M-99.