ALG Defense Quality Mil-Spec Trigger - QMS

Manufactured by ALG Defense, Inc.
SKU: 05-198
MPN: 05-198
Manufactured by ALG Defense, Inc.
58 Reviews

In Stock

Standard orders will ship out same day if ordered by 3:30pm CST. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.



The ALG Defense Quality Mil-Spec (QMS) Trigger takes the bomb-proof reliability and durability of a standard Mil-Spec trigger and removes the majority of grittiness you're used to. Like a proper Mil-Spec trigger, the pull will not fall below the 5.56 lbs specified for the M4 or M16, making it an ideal option for shooters who need to meet regulations but don't want to settle for a gritty, inconsistent pull.
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BrandALG Defense, Inc.
Drop InStandard Assembly
Manufacturer.ALG Defense, Inc.
Total Pull Weight6.5 lbs
Trigger BowCurved
Trigger Pin DiameterMIL-SPEC .154
Trigger StyleSingle Stage

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

Not much of upgrade


Replace ruger sr556 stock unit and it is really not an upgrade IMO. Bought 2 and will be returning the one still in the package for refund. If I didn't know which gun had the stock unit , I would'nt be able to tell the difference. Save your money for something better.

nice trigger


A big improvement over the mil spec in most LPK. Feels less than 5 pounds. Will get more in the future.

Make Primary Arms Your Primary Resource for Parts


As always, Primary Arms is always there with the best Customer Service and prices that can't be beat any where in the market. If your in need of a good quality basic trigger that has a clean smooth break, you cant beat this ALG trigger for the price, and you can't beat Primary Arms for quality service and price.



As good as I expect!

Great trigger assembly


As usual ALG produces the perfect product for a mid priced build.

Great bang for your buck


Bought a build kit AR-15's at a great low price. You get what you pay for - the cheap trigger double shot with each pull. A friend at work recommended this trigger as an upgrade. It was very simple to install and works great! Highly recommend this trigger to anyone with a similar situation I was in.

ALG Defense 05198QMS Quality Mil-Spec Trigger


Cheap improvment over the OEM trigger in my Colt AR.



Doesn't get any better than this

Awesome company and product


First the company: great service. I ordered on Friday, it shipped the same day and I received on Monday. 4 states away. Awesome.Second the trigger: Its amazing. So much smoother and crisper than a stock trigger. I could not be more pleased.

Trigger and service


Great service,trigger works as advertised