Ok, I have owned 4 sigmas, all 40 cal. Some were older, and some were newer (od green frame). All had the IDENTICAL trigger and everything else was identical. S&W did nothing to these guns, all are the same (save for sight differences, color, and ported barrels).
The SD has the same internals, so it is a sigma too. I pulled one apart at a gun show and the frame and trigger stuff is identical to the sigma.
Trigger reset is the problem, you can make a decent pull with polishing, and trim the springs, but you cannot improve the reset. Soooo, that is the issue, and why the glock or xd is superior.
I have done trigger work on glock, xd and sigma, plus others. Got the trigger very slick, but it still had a long pull and long reset, making quick shooting difficult.
Plus the materials, design and finishes applied to a glock are much superior to the sigmas and other plastic guns.
So get a used glock.
I picked all of my sigmas up for around 200 bucks. And made money on all of them when they sold.
The SD has the same internals, so it is a sigma too. I pulled one apart at a gun show and the frame and trigger stuff is identical to the sigma.
Trigger reset is the problem, you can make a decent pull with polishing, and trim the springs, but you cannot improve the reset. Soooo, that is the issue, and why the glock or xd is superior.
I have done trigger work on glock, xd and sigma, plus others. Got the trigger very slick, but it still had a long pull and long reset, making quick shooting difficult.
Plus the materials, design and finishes applied to a glock are much superior to the sigmas and other plastic guns.
So get a used glock.
I picked all of my sigmas up for around 200 bucks. And made money on all of them when they sold.