I have an M&P Sport from about 2015 with some furniture. It's a rock-solid rifle, and after several thousand rounds has always been 100% reliable. A few days ago I was practicing and I had 3 rounds that failed to fire the first time. 2 fired the second time, and the 3rd one fired the 3rd time. It felt like a hard primer issue, but this was standard, Federal Lake City M193 5.56 ammo, not Russian junk. I've fired a ton of this ammo, and this was the first time I've seen this happen. So I'm suspecting a weakened hammer spring.
In any case, can somebody suggest a top quality AR hammer spring that would hit harder? If it makes the pull a tad heavier, that's fine. I'm more concerned about reliability; another pound or two in the pull won't affect anything. What about these braided hammer springs? Are they really better or is it a gimmick?
I know Wolff makes an extra-power spring, but are they good quality? They're awfully cheap.
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