CMC Triggers AR-15 / AR-10 Drop-In Single Stage Trigger - Curved - 3.5lbs

Manufactured by CMC Triggers
SKU: 91501
MPN: 91501
Manufactured by CMC Triggers
45 Reviews

In Stock

Standard orders will ship out within 2 business days or less. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.



The CMC Single Stage trigger features a non-adjustable curved trigger bow with a 3.5lb pull that breaks like glass. It has almost no take-up and extremely short reset to make follow up shots fast and easy. The curved trigger gives you improved trigger control and keeps your finger placement consistent. The hammer is lightened and uses a high-power Rocket Wire spring that ensures reliability with commercial and surplus ammunition. The high-power spring also results in minimal lock time, which is the time it takes for the hammer to fall and strike the primer, resulting in much more accurate shots. CMC Triggers have invested in a new production and tooling setup that incorporates advanced techniques that help to reduce manufacture time and cost while still providing you with a high quality, reliable trigger that is affordable.

  • Compatible with AR-15 and AR-10 rifles
  • Installs with Mil-Spec .154” trigger pins
  • Single stage 3.5lb trigger pull
  • Non-adjustable curved trigger bow for improved trigger control
  • Tactile and short reset
  • Minimal lock time with lightened hammer and full power Rocket Wire spring
  • Drop-in, one-piece design made from 8620 alloy steel
  • Includes anti-walk pins
  • 100% Manufacturers Lifetime Warranty!

Note: Trigger pull weights are approximate and may vary between rifles

Assembling an AR-15 for the most part is pretty simple; however, some aspects of the process can be frustrating such as installing the takedown detent and spring or trying to put the trigger together. CMC Triggers saw a need to improve on the AR15 trigger installation process and introduced their line of completely self-contained trigger groups. Each trigger is encased in 8620 alloy steel to protect the internal components from dirt and debris, carbon buildup, or anything else that might get into the lower receiver and can be installed in seconds. Just drop it in, install the Mil-Spec trigger pins and you are ready to go. They have a huge selection of triggers that are built for specific applications and preferences. This model is designed for target shooting, home defense, and hunting as it has a light trigger pull to improve accuracy without sacrificing reliability or safety. Install this fire control group today and experience a smooth trigger pull like never before.

With roots in aerospace manufacturing, CMC is perhaps best known as the producer of the original drop-in precision trigger for the AR-15/10 platform. CMC Triggers are dedicated to crafting the finest parts and accessories for law enforcement, military, and civilian use.
See More


BrandCMC Triggers
Drop InDrop-In
ManufacturerCMC Triggers
Total Pull Weight3.5 lbs
Trigger BowCurved
Trigger Pin DiameterMIL-SPEC .154
TypeSingle Stage
Weight6.4 Oz

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

Ratings & Reviews

45 reviews

  • 4 stars
  • 0 reviews
  • 3 stars
  • 0 reviews
  • 2 stars
  • 0 reviews
  • 1 star
  • 0 reviews

CMC 3.5# Single Stage trigger


This is a really good feeling trigger, and the function is good it is a great improvement over the standard military trigger. The installation is easy and new pins are supplied with the trigger. I am using this in an old PWA lower with a new PSA upper.

Great trigger


Although this is my first AR and also my first experience with an after market trigger I can definitely notice a considerable improvement over the factory trigger. The CMC trigger breaks very crisply and predictably.

CMC triggers


as usual CMC quality is great, simple install easy to use excellent once you get used to the pull on it..... really will tighten up your 100 meter grouping..... great investment

Great trigger


As an older shooter, this can make all the difference with and AR-15. I'm finally back to the accuracy, I had when I was 20 in SEA.



Best Trigger for the money

Excellent Trigger Assembly


Bought this for my 300 Blackout. Price was right. Trigger pull is just right, break is crisp and even, good reset. drop-in installation. Comes with pins that have screws on each end for a secure installation. This trigger assembly has helped my shooting acuracy immensely. Every AR platform should have one.

CMC is a great product


Caught it on a sale so I was able to complete my waiting lower. I have five of these same triggers in rifles and SBRs.

cmc drop-in group curved ar-15 small pin .154" sin


drop-in perfect fit no problemsvery well made

Excellent Design


Easy to install, self contained, consistent, crisp. Short, crisp reset. Absolutely recommend it. Everyone who shoots my carbine wants one.

CMC Single Stage 3.5lb


Fantastic. The 3.5# pull is perfect for a wide range of applications; not too light, not too heavy even with gloves. The included screw pins are awesome, big improvement over the old c-clips. I would still use my KNS pins if CMC hadn't improved their design. Be sure to still apply blue loctite. Try not to use red loctite here as these screws generally don't experience a lot of pressure. Gotta make sure you do a solid installation job though. This trigger is expensive, but at the same time it really isn't. Any comparable trigger is gonna run you a few bucks more for no significant difference if any. This trigger has got it all. Creep is minimal, over-travel is not there and reset is almost unnoticeable once you really start shooting. All installation tools are included. If you want better groups and a pull that feels like greased ball bearings buy this thing. It won't take you long to forget how much you paid for it, trust me. Good luck guys.