I recently got a QMS trigger from ALG Defense and the kit included a diagram of the FCG that had call-outs that specified where grease should/could be applied. And those areas were, of course, points of metal on metal contact. In fact, the packaged QMS hammer had a dollop of grease applied on one of the lubrication points noted in the diagram.
Nothing new to the table here, just wanted to post the diagram on the interwebz as it's usually frowned upon to use grease on an AR15 and, if brought up, the topic almost always revolves around all the usual lube suspects. And, yes, the topic has been debated to death....
[Click on image to enlarge]
About the QMS trigger; an excellent, cost effective upgrade with a very crisp, clean break. This is not a match trigger, so don't expect a 3.5lb - 4lb pull weight. From ALG's website:
The pull of the QMS is very similar to a standard mil-spec trigger, however the majority of the associated grittiness of the stock trigger pull has been removed while the well known reliability of a stock trigger remains. The pull weight is not lower than the M4/M16 minimum weight specification of 5.5lbs.
If you are currently working on a new build (come on, we all are, whether it's in your head or a reality) and debating what trigger to get without breaking the bank, buy a triggerless LPK and get the ALG QMS. You will not be disappointed.
ALG's parent company is Geissele... 'nuff said.
Final notes. Following is a good post from ARFCOM that covers most of the lube points on your AR15. Note that 'G' stands for 'Generous' and not grease.
Update 09/22/14:
So, this evening, while still somewhat disgruntled about the NDs that I attributed to my personal actions or complacency behind the trigger, I performed a trigger function check and was able to replicate the FCG reset failure or doubling. I have contacted ALG and look forward to their response. I have already replaced the FCG with another QMS FCG (that I had on hand) and performed a function check that passed without issue.
This morning, 09/23/14, after sending an email to ALG yesterday, I received an email from ALG stating they were going to immediately send out a new QMS trigger and would include a stamped envelope so that I could send back the faulty trigger group. Top notch customer service.
09/26/14 I received my replacement and installed it. FCG checked out. I mailed back the failed FCG.
10/3/14 ALG responded to my inquiry regarding the problematic FCG after receiving it, their response:
I did receive the QMS trigger yesterday. The reason why you were having an issue with it was because the nose of the trigger was rounded over. When this happens, double firing is not uncommon.
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