I have not much trigger time yet on my drop in trigger but have the screw type anti walk pins. I will keep an eye on them. I have an ALG ACT in my 300 Blkout build for almost 2 years now and seems a great trigger.
I read the reviews on the Primary Arms website where several people are reporting issues with the screw heads on the provided CMC anti-walk pins shearing off but I've done some more research and it seems like it isn't as big of an issue as the reviews would make you believe. Nobody I've talked to that has personal experience with them has had any issues with theirs.
I have a BCM PNT trigger in my 300 Blk now, which from what I gather is basically the same thing as the ALG ACT trigger and it is a really good trigger. I have always loved flat triggers though and want to put one in my AR; the reduced pull weight and shorter reset will just be a plus.
I was debating between the CMC single stage drop-in and the Geissele Single Stage Precision trigger. Does anybody have experience with both of those? The price difference between the two is like $40 so it's not really that big of a deal but is it really worth it to drop the extra $40 on the Geissele? That's another couple boxes of ammo for the 300 Blk or a few more bucks for parts for the 11.5" 5.56 upper I'm building.