Yes, I've fitted a spring set from HVHA in aussie to my 1500 mini .223. Pretty easier to do if you're vaguely mechanical. Makes a huge improvement. I haven't measured before/after pull weight but I've got mine set at what I would consider 'sorted target rifle trigger'.
I've got another set in transit for a friend's 1500.
Definitely worth the 29 aussie bucks.
edit: I've got the HACT trigger
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