Details
Details
The ALG Defense Quality Mil-Spec (QMS) Trigger is a precision-engineered upgrade for AR-15 platforms, designed for shooters who value traditional mil-spec performance with smoother operation and enhanced reliability. Built to meet U.S. military specifications, the QMS maintains a pull weight above 5.5 lbs, eliminating the grittiness of standard triggers while preserving their legendary dependability. Ideal for duty rifles, armorer builds, or any application requiring mil-spec compliance, this drop-in AR trigger upgrade delivers improved performance without sacrificing regulatory compatibility.
Features:
- Smooth, consistent pull with improved sear surface finish
- Maintains standard sear geometry for maximum reliability
- Constructed from military-spec 8620 alloy steel and 1070 high-carbon steel
- Trigger and hammer pins made from durable 4140 chrome-moly steel
- Pull weight approximately 6.5 lbs, compliant with M4/M16 military standards
- Compatible with standard installation procedures and spare parts
- Corrosion-resistant springs and full-force hammer spring for reliable ignition
- Pins are precision-ground 0.001" over standard to reduce play
- No matched sets—parts are interchangeable for easier maintenance
- Assembled in the USA
Specifications
California Prop 65 warning
WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.Ratings & Reviews
60 reviews
great place to buy
by fast eddie
Recently purchased an alg trigger and this place was greatNice and friendly staff I recommend this place trigger went on easy an functioned great
ALG Defense 05198QMS Quality Mil-Spec Trigger
by Herman
Cheap improvment over the OEM trigger in my Colt AR.
ALG Defense 05198QMS quality Mil-Spec Trigger
by Frank
I haven't Installed the trigger yet. I will update once I finish the lower build. The online ordering was easy. Even with in store pickup. I will do business with you again.
ALG Defense 05198QMS quality Mil-Spec Trigger
by Frank
I haven't Installed the trigger yet. I will update once I finish the lower build. The online ordering was easy. Even with in store pickup. I will do business with you again.
GREAT
by WILLIAM JONES
YOU CAN' GO WRONG. GOOD PRICES GOOD CUSTOMER SERVICE. THANK YOU
IMO the best value trigger
by Jimmy K
When paired with JP Reduced Power springs, the trigger feel is very good.With some additional tuning of the engagement surfaces, the feel is comparable to enclosed trigger units in the $150-$200 range.
Top Quality
by TOM
Very well made product and while it isn't an SSA from Geissele, the quality is still there and works just as it should.
QMS Trigger
by Rob
Trigger is great!! Primary arms is even better!!!! Order placed on Friday and at my door on Monday!!! What else can I say!!
Probably the best for the price
by Bryce Booher
This trigger is fantastic. I coupled this with JP spring kit (the yellow). Extremely smooth all the way through. When I tested mine, it came in at 5 lbs exactly (but that was with the lighter springs). I would HIGHLY recommend this trigger to anyone building an AR for the first time, or just want a better trigger than a stock CMMG or DPMS kit. This trigger is only about $15 more than a CMMG kit and it's leaps and bounds better.
Geat Trigger
by Rick
This kit turned a long, heavy, gritty pull. Into a wonderful clean break. Not to heavy not to light. Will not disappoint.