I have to agree with Stuart. It's a factory gun with optional factory OFM parts installed, and with open sights fitting the original dovetail. The issue that seems to be complicating matters is the name "Target 2" assigned to this package of factory parts.
OP asked for IPSC Standard Box Legal mags, in which case there is no other choice AFAIK than the aluminium CZ UB basepads. You may have to clip a coil or so off the Gramms Limited length spring for 19 rounds with that base pad
Heating up the sight may make things worse..heat expansion.. I'd try a liberal spraying (also on the set screw hole), or even soaking overnight, in WD40, and then attempt removal again..
Perhaps a polish of the firing pin block and the hole it fits in to go...for that last little bit in SA reduction..(polishing hammer sides, pinholes and hammer strut do more for DA than SA, obviously..)
No it doesn't. Only springs that was included in my kit were:
15# hammer spring
Lighter safety plunger spring
New firing pin spring
Ah, so you still have a half pound reduction of DA on the table, quick and easy....
Awesome.
That dude was so perfectly camo'd with the green sweater against a green backdrop, with green pouches and green Velcro, I thought I was just watching a head floating in a green space..