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Discussion Starter #1 (Edited)
From what I can tell from browsing around the internet, it would appear the AR15 SSA simply drops right in and works fine in the ACR. This version is readily available for $170.

On the other hand, Geissele is perhaps just a few weeks away from releasing their ACR specific SSA and SSA-E triggers (SSA/E) for $250 (however, no trigger box housing is included for those who are wondering).

According to a Geissele service rep I spoke to, the only difference mechanically between the AR15 and ACR versions of the SSA/E is the back of the ACR version trigger was made a little bit larger. This was done to provide a better fit with the ACRs ambi safety resulting in little or no trigger movement when the ACR's safety is in the "on" position. Presumably, this would mean that there is some play between the trigger and the safety if an AR15 SSA/E is installed into an ACR, but not so much as to disable the gun's safety altogether.

So, what you think, $170 now for an AR15 SSA/E trigger that appears to still be safe but with a little bit of slop in the trigger/safety engagement?

OR

$250 in a few weeks for an ACR SSA/E trigger which is essentially the same trigger group (the hammer and disconnector are still AR15 SSA/E) but tighter trigger/safety engagement?

Of course, there are other alternatives such as RRA (or DPMS which is on sale now for about $92).

Thanks,
f1
 

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I would hold out a few weeks for the ACR compatable version. The small amount of slop in the current trigger is something small that would eventually irritate me, but I'm OCD like that lol
 

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...i've heard the hammer spring is longer on the acr version...haven't heard that the hammer itself is bigger...where did you get $250 from?...i've heard $350+...hope it's changed...
 

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where did you get $250 from?...i've heard $350+...hope it's changed...

Perhaps they realized after reading threads that $350 was an outlandish number and wouldn't generate any sales, seeing as there is already a DIY spelled out using a cheaper kit...
 

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I just installed the SSA!

I just installed the Geissele SSA trigger in my ACR:
http://geissele.com/supersemi-automaticssatrigger.aspx

I ordered it right before I saw this thread and was concerned. I was very careful to see how different it was from the original trigger and I look at the trigger play with the safety on and more. I see no difference in the amount of play with either the original trigger or the SSA. I swapped back and forth several times. I also looked at the dimensions and the are very close. I did every safety check I know of there were no problems.

What a difference! The first stage pull is averaging at 3 pounds, 8 ounces. Second stage is averaging 4 pounds, 14 ounces. I could swear it was under 4 pounds. Very clean and crisp.

So, my experience is that the standard SSA is good to go in my particular gun.
 

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Very nice, please let us know how it performs on the range. Bet your groups will show the difference.
 

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I just installed the Geissele SSA trigger in my ACR:
http://geissele.com/supersemi-automaticssatrigger.aspx

I ordered it right before I saw this thread and was concerned. I was very careful to see how different it was from the original trigger and I look at the trigger play with the safety on and more. I see no difference in the amount of play with either the original trigger or the SSA. I swapped back and forth several times. I also looked at the dimensions and the are very close. I did every safety check I know of there were no problems.

What a difference! The first stage pull is averaging at 3 pounds, 8 ounces. Second stage is averaging 4 pounds, 14 ounces. I could swear it was under 4 pounds. Very clean and crisp.

So, my experience is that the standard SSA is good to go in my particular gun.

Nice review! I'd also like to see a few pics of the grouping and of the new trigger system.

Has anyone though of putting one of those nice Chip McCormick "Tactical Flat" Triggers into an ACR? I've tried it on an AR and it was light and crisp.

http://www.cmctriggers.com/
 

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I've got an SSA on the way. I'm looking forward to getting that installed and getting some more range time soon!
 

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I dropped in the Geissele today. Pretty straightforward install though working with the pack instead of a complete lower made me realize how much I manhandle the lower when I install a trigger in an AR.

So far in testing and dry fire that trigger is titties. Very solid second stage engagement with a crisp release. I'm looking forward to getting some range time with it soon.

I did use the factory ACR hammer spring however, but the trigger is such a nice unit I don't think it makes much of a difference.
 

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Nice,,Was it like installation of an AR trigger group? How much did you have to wrestle with the safey detent to get that spring leg in there?
 

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Nice,,Was it like installation of an AR trigger group? How much did you have to wrestle with the safey detent to get that spring leg in there?
Yeah, it's all the same as an AR install just that working with just the little trigger pack was, different. Geissele includes a slave pin (old armorer's trick) to hold the trigger and disconnector together so it makes it very easy.

Since the trigger pack is open on the bottom I found it easiest to insert the trigger assy almost vertical, line up the holes and then insert the trigger pin. The spring will force it into this position anyway so no need to fight it. Installing the hammer was almost a three handed affair but it's doable with a little leverage. And, I must admit, I actually installed it sitting in my car waiting on a food order for the office. Just the pack, not the rifle!
 

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i dropped in the Geissele SDC trigger when it first came out and I am shooting some nice groups with Prvi surplus 55gr. ammo. I shot some groups and am able to cover them with a quarter at 50 yards. I did a side by side with an AR i put together and the ACR out shot the AR hands down.

The AR is a DD 16'' CHF barreled upper, Geissele SDC/E trigger, Noveske lower, DD LPK, Magpul ACS stock, NF NXS 1-4x FC2 scope in a Larue mount, GG&G bipod and little things here and there.

The pic is the final string of shots during my zero.


 

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I have an SSA. I installed it as soon as I got my ACR. I just had to slightly bend one of the legs of the spring for the ACR safety. I love it but I still want to try out a SSAE. I might purchase it and whichever I like more will stay in the acr and whichever I like second best will be moved to my AR15.
 
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