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I just recently installed the Apex spring kit and the Apex polymer trigger in my SD40VE and it was the best thing I did. Fortunately, I didn't have to file any off of my trigger. The whole process took 30 mins and it was literally a drop in install. I have fired about 150 rds through it now without any issues at all. I also installed the Galloway SS guide rod with the 20# spring as well. It's like a completely different (better) firearm now.![]()
I did the same on my SD9VE (Aug 2016). I did have to spend two hours painstakingly filing the trigger to make it work. I was able to save myself some work by trimming off some of the excess polymer on the seam behind the trigger using a sharp penknife.
Filing the back of the trigger while it's installed is a bit tricky, but with patience, care you'll get there. Using a penknife to shave off the roughness created by the filing really makes for a nice finish too. The cost was over $100 for all the parts needed.
If you already own an SD9 series handgun, these upgrades are well worth the investment in time and money, not to mention the educational experience of completely disassembling and reassembling your firearm.
If you are contemplating these upgrades to your SD or MP, WATCH THE VIDEOS, and watch them more than once, and follow them step by step.