Sure, it's easier to shoot sub MOA groups with a 8oz trigger than a 6lb trigger, but with proper form, you can still shoot sub-MOA with a 6lb trigger. (and frankly, too many 'shooters' use an inappropriately light trigger to mask very poor fundamentals) however, the OP said he's looking for CQC, not benchrest. And since he's not going to put a nice scope on a CQC carbine, it's not like he's really in a position to take advantage of benchrest groups anyways.
For CQC, all a nice trigger really lets you do is get faster split times and make it a little easier to keep the second round in the A zone. A red dot on the other hand, let's you get on target faster (faster transitions), and keep a target focus (situational awareness) instead of a front sight focus with irons. I'd take faster first round on target over faster split times any day.
I think the triggers you recommended (I have a few of them) are solid choices for CQC on a budget.
I can't tell what you meant by this sentence "They fill that in a high street environment, such as combat, a red dot sight." But it's clear the military believes red dot sights are a priority over triggers because they issue red dots. Do they issue ALG or ACT triggers? I'd be surprised if most units even allow aftermarket triggers.
I have a few nice scopes, like a NF ATACR 1-8x, Swaro z6i 1-6x, Vortex gen2 HD 1-6x, USO 1-8x on various social and gamer AR15s.
And I have plenty of high end triggers, like geissele hi-speed national match, x-treme (old cg-jackson), etc and a bunch of mid-range stuff like geissele SD3G, and most of other geiselles, rock river triggers, larue and more, and then a bunch of the budget stuff, like ALG, and regular mil-spec, and mil-spec with coatings. and excellent triggers in bolt guns too; currently running trigger tech diamonds.
so yes, to answer your question, I have shot an AR with a nice scope and a milspec trigger and then the same rifle with a better trigger. Heck, I'll do you one better. I got 4 leg points in the M16 intro EIC match at camp perry, where everyone uses a rack grade, worn out, actual issued M16 with an as issued trigger. similar course, including standing, offhand, at 200 yards, shooting at a 3" x ring and 6" ten ring, followed by shooting the P100 and NTI the following days with my own rifle with fancy trigger (4.5lb minimum weight).
the funny thing is I'm kind of a trigger snob, and am pretty opinionated about what makes a good trigger and what doesn't. i really like nice triggers, and i put pretty much the nicest triggers there are in my ARs that i really intend to use. But if I was on a budget, a trigger wouldn't be in my top 5 upgrades
you're always going to have exceptions to the rule, especially on the internet, where someone will always come along and tell you they don't like pie, or put a million miles on their yugo, or their jennings/bryco never malfunctioned, or they shoot better with irons than optics. ok sure. but that's doesn't change the rule that red dots are such a game changer, that we put people in separate classes when they compete, but that triggers are a very slight improvement, and a great many of them give up reliability (though not the ones you mentioned imho).
here's an example. i just searched google for "tactical carbine match scores" and this link to a monthly club 2gun match was on the first page.
https://centralcarolinagunclub.wildapricot.org/page-1788404 I had to go back 5 months to January to find an IRON SIGHTS division shooter who's time would have placed him in the top 20 of optics division.
Look at the data for fastest optics and fastest iron shooters
May 172.9 vs 317.27
Apr 216.38 vs 430.39
Mar 145.67 vs 335.96
Jan 198.38 vs 394.81
Dec 137.09 vs 185.23
Nov 176.97 vs 314.76
Aug 158.7 vs 211.79
Jul 154.49 vs 330.88
Jun 150.02 vs 267.93
that's a year of matches. and over that year the fastest and most accurate optics guy was
46%
50%
57%
50%
26%
44%
25%
53%
44%
faster and more accurate than the fastest and most accurate irons guy. best case for the irons guy, he gets beat by 25%, but often over 50%.
i reckon you'll have a hard time finding anyone who tracks times for stock triggers separately from high dollar triggers. that should be a big clue that nobody who actually shoots thinks they make that big of a difference for HD style carbines.
