CMC Single Stage Drop in AR15 Trigger Review
One
of the quickest and least painful accuracy upgrades to an AR15 is
trigger upgrade. The challenge becomes that people tend to go way
overboard thinking they need an adjustable trigger to get great
performance and so they can “tune” it. The problem is that very very few
of us have the talent to actually tune a trigger safely. The other
issue is that multi-piece replacement triggers can be a bit tricky to
install for the first timer. CMC solved these issues with a design that
offer defense and military level durability and reliability with a
maintenance-free un-tunable design that still delivers one of the best
feeling match AR15 triggers on the market.
FIT, FINISH, FEEL, FEATURES, & FUNCTIONS
The
fit and finish of the CMC triggers are excellent with no sharp or
roughly finished edges. What has impressed me is that the entire
cartridge/unit is the spec’ed to precisely fit snuggly inside the
trigger cavity on the lower. The fit is perfectly tight and after
tapping in the oversized retainer pins lock in the trigger rock solid.
This wiggle free rock solid mount adds to the accuracy and crispness of
the trigger feel.
The
CMC Triggers are non-adjustable which is a huge plus from my
perspective. I will guarantee that if there is an adjustment, someone
will attempt to adjust it. The problem is that triggers tuned
incorrectly, can cause a huge safety risk. CMC circumvents this issue by
delivering a perfectly tuned design what does not allow or require
tuning.
CMC
Triggers are famous for durability and safety. Part of that design is
due to the screw-less design - which makes the CMC Trigger Unit less
prone to damage, loosening, or failure. The self contained and
functioning cartridge/trigger-unit based design is also in theory safer
than one which pivots on stock trigger pins. Stock trigger pins and
placement and be slightly oversized which can lead to slack and wiggle
between the hammer and trigger sear. The CMC trigger design is perfectly
locked down and aligned inside it’s self contained unit and only uses
the retainer pins to lock the trigger unit into the receiver.
Front
a tolerance perspective, CMC maintains a .001” +- tolerance on every
surface. All these little details all add up to a perfectly crisp 3.5lb
trigger. Keeping in mind the super pro Camp Perry shooters are limited
to 4.5lbs, so 3.5lb is plenty light even for the super picky.
The
trigger has zero take up and no overtravel. You could get a lighter
trigger in a very high dollar adjustable match trigger, however I doubt
the trigger crisp feel would be better and I would not want any lighter
in a defensive/3Gun competitive focused trigger anyway.
The
CMC triggers are available with either flat or curved trigger designs. I
picked up one of each; the curved is installed in an Aero Precision
ambidextrous lower receiver featuring an Anderson Upper, charging handle, BCG, and barrel build with
Fortis muzzle brake and Sampson handguard.
The
flat trigger version was installed in my Robar NP3 coated Barnes
Precision Machine Patrolman’s Carbine. Installation was simple and easy
which is the cornerstone of the simplicity of the CMC Trigger unit.
Simply tap out the stock trigger pins, remove the hammer assembly,
remove your pistol grip, selector spring and detent, selector and
trigger blade assembly. Installation is a lot simpler; drop in the CMC
trigger unit, slip in the selector, reinstall the grip, detent and
spring and tap in the CMC oversized trigger pins and secure with the
anti-walk e-clips. The entire trigger upgrade process takes less than 15
minutes.
FINAL THOUGHTS
The
CMC Triggers are highly durable, precision and deliver what every
shooting is looking for in a crisp match quality trigger. CMC does it
for at least $50 less than any other comparable competitor trigger and
in some cases for $150 less. It is a mighty fine trigger design overall
however the flat design has really become a favorite of mine on my
Barnes Precision AR. It is very fast when moving around during 3Gun
style and extremely precision on the bench. Overall this is a great
upgrade for the price which can be easily moved if you swap ARs.
SPECS
Curved or Flat Trigger Style
One Piece Drop In Trigger
AR15 and AR10/DPMS/SR-25 compatibility
Captured Trigger Pins
Trigger Pin Size .154” (Standard AR15 Pin Size)
Street Price $172
CMC Triggers - http://www.cmctriggers.com/
Other Featured Products
Aero Precision Ambi-Lower & Flatside upper - http://aeroprecisionusa.com/
Anderson Manufacturing Barrel - http://www.andersonrifles.net/
Fortis Muzzle Brake - http://fortismfg.com/
Samson Forend - http://www.samson-mfg.com
Barnes Precision Machine Robar NP3 coated AR15 - http://www.usamade-ar15parts.com
3 comments:
I gotta know what's your preference CMC or the hiperfire trigger? You have given both great reviews have a favorite between the two?
I gotta know what's your preference between the CMC trigger and the hiperfire trigger? They were both reviewed favorably by you have a favorite?
That is like asking whether you prefer the Ferrari or Lambo. My preference is the Hyperfine for tenability, however the CMC for a rifle for defense the CMC.
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