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sound like the disconnector spring install upside down.

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It is VERY important to be sure you are pulling the trigger every time your rifle fires. It is possible that you are occasionally having a bump fire and that will improve as you practice and get used to your rifle. Do you have a stock trigger? If the disconnector is occasionally malfunctioning then you could be getting hammer follow and a double fire. This would need to be fixed ASAP. A malfunctioning gun that fires more than one shot per function of the trigger is a safety problem and a legal problem also. That is why is is critical to figure out exactly which issue you are having.

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Please contact me ASAP. We wil address and correct this issue for you. Please email me at [email protected]

Cody
Adams Arms
Customer Service Manager

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In my nearly 21 years in the military (AF Security Forces LE/SS/CATM), the cause for the majority of unintended discharges wasnt mechanical, but shooter induced. What you describe seems to be the result of sloppy trigger control. Make sure that once you place your finger on the trigger, it stays there (after you initiate a course of fire). Once that first shot breaks, slowly control the trigger forward (reset) until you hear/feel a "click." A lot of shooters (new and old) have a tendency to jump off the trigger when the shot breaks, and even light recoiling weapons such as an AR can cause a second round to fire if deliberate trigger contact and control is not maintained by the shooter. Make sense? Try an online search of Marksmanship Fundimantals and you will likely find a better explanation than I can provide (I'm on my phone and I'm nursing busted and bruised ribs from a cycling fall).

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I'm willing to bet they replaced the FCG out of an abundance of caution, any suggestion of a firearm malfunctioning in a double tap or machine gun manner is not something they can take lightly. As soon as they saw this thread they pretty much had no choice but to get it back and replace the trigger.

When you take it out stay very mindful of the trigger, remember good trigger control is to pull and not release, a good pull, keep the trigger to the back, then a deliberate release.The whole pull and release cycle need to be spread out or else you will snatch the trigger causing sub optimal accuracy.

While holding the trigger to the rear, cock the hammer, which
should be retained by the disconnector at this point. Next, as slowly
as you can, allow the trigger to travel forward and observe if and
when the hammer reconnects to the sear. In most cases, it will not
function properly at this point, the most likely cause of which is a
failure to reset due to late disconnector timing. In other words, the
hammer is remaining attached to the disconnector, which may
require the modification described below. In some setups, the
hammer may drop all the way down without connecting to the sear
due to premature disconnector timing. This results in more than
one round being fired with one pull of the trigger, which is definitely
unacceptable. The hammer should release from the disconnector
as close to the end of the reset travel of the trigger as possible,
giving the impression that the hammer resets when the trigger
stops at its forward most position. Repeat this test at least eight to
ten times.

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Like flphotog's rifle, mine just went back to AA (they covered shipping both ways) and they addressed its two issues (fire control group and bolt catch) and I've already got it back.  I couldn't ask for faster...it got there on a Friday, and it was back in my hands the following Wednesday.  I suspect they received it Friday, worked on it Monday, shipped it back on Tuesday.  I sent it in expecting to not see it again for a month or more.  I haven't had a chance to shoot it again yet, but AFAICT, they fixed both issues.