Blast pack - TANDEMKROSS Blast Pack

I couldn't pass up the 10% discount on this item, The trigger pull on my Mark IV Target was more than I liked, 4.5/5 pounds. I wasn't ready to spend the money until I saw it here. It is tricky to install, just needs a steady hand and cool head. There are videos that go thru installing it step by step. After installing I now have a 2.5 pound trigger and the magazine disconnect is disabled. If the sear pin doesn't want to slide easily into the sear a small round file works to remove any burrs. All Blast pack Mark series sears have the same size sear pin hole. I called manufacturer because the sear pin was very tight, They sent me a new one free of charge. Then i decided to take a file to the one I have. It only took a few minutes. This item shipped very fast and happy with my purchase.