I have several different brands of those drop in metal trigger blade replacements and NONE even came close to the feel of true match grade Challenger / Marauder Gen1 trigger drop in replacement with credit or gift card shim spacer. Real disappointment here. Wasted $30-75 on those drop in trigger kits for sure trying them all. If you need ounces then the Challenger and Gen1 Marauder trigger is the only way to go. You can get them down to around 3 ounces with a little work if 4-6 ounces too heavy for you.