Trigger = JB yellow spring ( midway UK) will sort that out easy ... ( cheap !!! )
Ammo = CCI Tactical , it was made for this rile, and all other black .22 rifles

Feel, it may be lighter, but you get more feedback from a .22 with this rifle,than any of the others...
As for the Umerex / Colt / HK / GsG guns..... IMO = rubbish , don't believe me .....?!? ... Try to strip and clean one !!

Many thread on here about these, and my opinion over the last 2 years is still the same ... And I will keep posting the same ... : )