Chip McCormick trigger

[Redneck 38]

Just installed one in a Colt AR-15. No sweat. Take the upper off, pull the hammer and trigger pins and take out the safety selector. Modular trigger fits perfectly in the Colt (.154" pins) Furnished pins have a small head on one end, and c-clips on the outside of the receiver on the other end. Took less than 15 minutes to put everything back together.

Trigger breaks clean at 4 lbs (3.5 lbs advertised), has a lot of overtravel but not noticeable when firing. Safety selector worked without any fitting.

I'm going to put one on a DPMS Oracle for the same guy.

Tom

 

[ORD]

Just installed one in a Colt AR-15. No sweat. Take the upper off, pull the hammer and trigger pins and take out the safety selector. Modular trigger fits perfectly in the Colt (.154" pins) Furnished pins have a small head on one end, and c-clips on the outside of the receiver on the other end. Took less than 15 minutes to put everything back together.

Trigger breaks clean at 4 lbs (3.5 lbs advertised), has a lot of overtravel but not noticeable when firing. Safety selector worked without any fitting.

I'm going to put one on a DPMS Oracle for the same guy.

Tom

So...to sum up then...

1) You installed a CMC AR-15 trigger pack with relative ease (I agree...so simple a caveman could do it on the 5-6 I've done over the years);

2) the weight of pull advertised at 3.5lbs was NOT what you received as yours measured in at 4lbs (guess a 1/2lb off is better than 2lbs, but an apple is still not an orange under the circumstances and I certainly wouldn't be pleased if I wanted 3.5lb and got something in between two of their advertised triggers); and

3) it has a lot of overtravel (if this is really the case, send it back and ask for a replacement because they are supposed to feature "minimal" overtravel, but NOT "a lot" which leads me to believe you got a lemon, especially with the weight of pull also off, or there are wildly varying opinions re: what is a lot and what is not a lot of of overtravel).

I don't use the CmC triggers any longer after some "issues" not related to any of the above, but on ones that I have installed for others, the weight of pull has been as advertised and the take-up and overtravel was not what you seem to be describing as having "a lot." Whether they are your triggers or for a customer (seems like you were doing the install for someone else), you should double-check the other trigger once installed and see if you get the same levels of performance. Either way, whether you do or don't, that trigger with the wrong weight and overtravel issues probably needs a trip back to TX for inspection/replacement as warranted.

 

[tipper]

This looks like bait.
But I have to agree with ord. A four pound is a ton to me, don't all ar triggers have over travel for the hammer lock to work.

 

[Redneck 38]

Ord, I pay attention to experienced comments, but believe we are looking at the same thing from a different perspective. I used to shoot Service Rifle competition, first with a Garand then an M-1A. To shoot in a registered or leg match, both rifles were required to lift a 4.5 lb trigger weight. No spring scales, only dead weight trigger scales. The purpose of the 4.5 lb pull was to ensure that enough sear engagement existed to prevent uncontrolled fire. Normally doubling, Always scary. The relatively heavy sear engagement ensured that the trigger would engage the rear hammer hooks sufficiently to hold the hammer while the trigger was momentarily held back after firing. When the trigger was released, the rear hooks had to transfer the hammer to the primary sear without releasing it. They were 2 stage triggers and could be tuned to release cleanly. Take up would be smooth and the release would break clean, just a little heavy and with a lot of overtravel.. Gas gun shooters had to adapt to the weight and ignore the overtravel. To this day I like a 4 - 5 lb trigger that breaks clean on any working gun, bolt guns included.

I don't know the current rules for mouse guns, but I expect the triggers are heavy enough to avoid the same problems.

On the CMC trigger, I liked the modular construction, non-rotating and non-walking pins. I also chose the trigger over some more expensive triggers that advertised 3 lb pulls or were adjustable. I didn't want anyone mucking around with an adjustable trigger on a semi-auto rifle. Obviously I'm not offended that the CMC trigger lifted 4 lbs instead of 3.5 lbs. I also agree with tipper that the overtravel may be why the safety selector functioned perfectly without tuning.

This is the only aftermarket trigger I've ever installed in a black gun, and have nothing to compare it too except the Colt and every other factory AR trigger I've ever pulled. They all had long, creepy takeup, nasty let off and an 8 lb lawyer installed.

This trigger is the single stage trigger. It breaks clean, and the safety selector worked without any tuning.

Bottom line, a breeze to install, everything worked without any trauma,and my friend is very happy. We both like the trigger.

Like I said, just different perspectives.

Good shooting, Tom

 

[Regalkismet]

So...to sum up then...

1) You installed a CMC AR-15 trigger pack with relative ease (I agree...so simple a caveman could do it on the 5-6 I've done over the years);

2) the weight of pull advertised at 3.5lbs was NOT what you received as yours measured in at 4lbs (guess a 1/2lb off is better than 2lbs, but an apple is still not an orange under the circumstances and I certainly wouldn't be pleased if I wanted 3.5lb and got something in between two of their advertised triggers); and

3) it has a lot of overtravel (if this is really the case, send it back and ask for a replacement because they are supposed to feature "minimal" overtravel, but NOT "a lot" which leads me to believe you got a lemon, especially with the weight of pull also off, or there are wildly varying opinions re: what is a lot and what is not a lot of of overtravel).

I don't use the CmC triggers any longer after some "issues" not related to any of the above, but on ones that I have installed for others, the weight of pull has been as advertised and the take-up and overtravel was not what you seem to be describing as having "a lot." Whether they are your triggers or for a customer (seems like you were doing the install for someone else), you should double-check the other trigger once installed and see if you get the same levels of performance. Either way, whether you do or don't, that trigger with the wrong weight and overtravel issues probably needs a trip back to TX for inspection/replacement as warranted.

Try a Wilson combat TTU either 4 pound single stage or 2 stage match.... All reviews I've seen show actual trigger pull averages to be under 3.5 lbs... and ZERO over travel.... I have both and my experience follows all those reviews.

 

[Redneck 38]

RK, Looks like I'm going to have to go to another trigger for the DPMS Oracle. After I read your reply, went to Brownell's. The CMC is not available for the 7.62 rifle. Neither is the Wilson. My 1st 2 choices for his AR were the Wilson and the CMC. The price was the tie-breaker. Any recommendations for the DPMS Oracle?

Thanks, Tom

 

[shooter545]

AR Gold .308 model

 

[Regalkismet]

RK, Looks like I'm going to have to go to another trigger for the DPMS Oracle. After I read your reply, went to Brownell's. The CMC is not available for the 7.62 rifle. Neither is the Wilson. My 1st 2 choices for his AR were the Wilson and the CMC. The price was the tie-breaker. Any recommendations for the DPMS Oracle?

Thanks, Tom

Wilson combat triggers are compatible with dpms 308 rifles.

Wilson Combat AR-15 Tactical Trigger units will reliably function in any standard USGI style AR style lower receiver with standard GI trigger pins of .154” diameter regardless of caliber, including 7.62/.308 length AR receivers. *

 

[Regalkismet]

AR Gold .308 model

If you are using certain safety selectors like the BAD AMBIDEXTROUS SAFETY and some others you may have to make some modifications to the trigger tail or the safety selector with AR Gold triggers... I read that on several forums.... I don't have, nor have I used one, but something to keep in mind if you go the AR Gold route... I highly recommend doing a search on AR Gold reviews.

 

[sch2046]

I run cmc triggers in my large frame ar's, work great.

 

[Redneck 38]

I had been told that the hammers for the .308's were longer, so discounted any trigger that didn't specifically say it was for the .308's. Interchangeability opens the field. For myself, I'm used to 2 stage triggers, but will stay with a single stage for the Oracle. Probably another CMC.

Shooter, RK, and 2046, thanks for the info. Do you guys know anything about the Oracle accuracy? I'm wondering if it's worth putting a decent trigger in it for him. I don't remember seeing anyone brag on one of them.

Tom