I'm often asked by my students what I think about modifying the trigger pull of their carry gun. Most of the time, owners do not wish to increase the weight of the trigger pull on their firearm, and they seek to lighten it. For this reason, when referring to trigger modification, we will be addressing reducing the weight of the trigger pull from what is set by the manufacturer.
For example, lets say your firearm comes from the factory requiring 5.5 pounds of force on the trigger to fire a cartridge. Reducing the weight of the trigger pull to 3.5 pounds of force would make it easier to pull the trigger.
I'll give you my opinion based on an intimate understanding of the factors involved in a high stress, deadly force shooting, and the legal process (criminal and civil) that will likely follow. This topic can quickly expand into many areas of gun modification, so for this reason, I want to address handguns carried for personal defense. It does not matter whether you carry your firearm concealed or openly. The facts associated with modifying the trigger on your carry gun remain the same.
How Can You Modify a Trigger?
One way is to buy an aftermarket ‘drop in' trigger group, which replaces the factory trigger mechanism. Some of the benefits of these aftermarket triggers are that they change the shape of the trigger shoe (the part your finger actually rests on). The change in shape can help with finger placement and leverage as you pull the trigger.
Aftermarket triggers often have polished parts that smooth out the trigger pull, remove some of the gritty feel, and produce a crisper trigger break. Some of these products actually use OEM parts, and simply change the feel of the trigger, i.e. pre-travel, reset, break, etc.
There are also drop-in products that reduce or increase the pull weight of the trigger.
A second way to modify the trigger is to mill, grind, file, or otherwise physically modify the original trigger group components of the firearm to reduce the trigger weight. While competition shooters are often more likely to do this to their firearm, some of these modifications are being made to everyday carry guns, or competition guns are being used to perform dual roles.
This should only be performed by a highly trained gunsmith, and even then, can be very dangerous. Any modification to the tolerances of the firearm’s components could cause it to malfunction, wear and fail prematurely, or even fire when not intended. For this reason, it is STRONGLY suggested that this type of modification not be done to your EDC firearm.
Here are some factors to consider:
Reducing the weight of the trigger can help with accuracy. Typically, shooters do not hit their target because as they squeeze the trigger, they affect their aim and push/pull their sight alignment. While accuracy is a critical part of the equation, and we want to be as accurate as humanly possible, we need to understand that a deadly force or self-defense shooting is not a marksmanship competition. In that, I mean we are not trying to shoot all of our bullets through the same hole. We instead want to target our threat and balance speed with the ability to ensure all of our bullets strike our target area on our threat.
This type of accuracy is often referred to as combat accuracy, or accuracy that allows the shooter to place effective hits on a human-sized target. For this reason, the micro accuracy hoped to be gained from reducing the weight of the trigger pull is unnecessary in the vast majority of deadly force encounters. I'll mention some things to consider later in the article, in reference to trigger pull weight.
As I mentioned above, there are real benefits that can be gained by changing your factory trigger, and they don't all revolve around reduction of trigger pull weight. These are trigger modifications that smooth out the trigger's feel and movement, or help in centering your finger on the trigger (a flat trigger shoe can help with this). These modifications can in many cases, result in an astoundingly better feel to the trigger without actually changing the weight.
I have been personally amazed and tricked some people into believing I have installed a lighter trigger pull on their gun when all that was done is install a trigger group with polished internals and a reshaped trigger shoe design. These types of drop in trigger groups are typically a more reliable option because you don't have to fit or adjust anything. Instead, these products are usually a direct replacement part. It is important to remember that not all companies produce the same quality product, so do some research on the reliability of the product before you install it. And, don't forget to test it before carrying it for self-defense.
Now My 2¢:
Everything you do, say, have done or have said in the past related to your character and firearms (accurately or not) will be presented in your criminal and/or civil trial. This means that in addition to your possible kill ‘em all and let God sort ‘em out social media posts, the type of ammunition, and your firearm will be scrutinized. Every incident is different, and sometimes one bullet may be sufficient to stop the threat, while another time, nothing short of every round you are carrying will stop the threat.
In criminal cases, the core question in the hands of the jury, is if there was reasonable and honest belief of death or serious bodily harm at the time each shot was fired. Because of the high burden of proof (beyond a reasonable doubt) and the presumption of innocence until proven otherwise, the facts about trigger weight, the appearance of the firearm and character issues, while still very important, have less weight in shifting the balance from a justified shooting to something criminal.
In a civil case on the other hand, where only a more likely than not decision needs to be reached, more factors can greatly influence the decision. For example, reducing the weight of your trigger pull could present a kernel of doubt into the minds of the jury and have them guessing if the follow-up shots were really necessary, or if they were a result of your modified trigger and the stress of the incident.
Let me be clear, every shot may have been justified, however, gambling that every juror understands the nuances and factors associated with a self-defense/use of deadly force incident are not worth it in my estimation.
Ultimately, you may win your criminal or civil case, but at an incredibly high emotional and monetary cost.
Reducing The Trigger Pull Weight Makes me a Better Shooter, Well so Does Training:
The last point I would make is that most anyone who does not have some sort of physical disability has enough strength to pull a 5.5lb trigger, and the difference in a 5.5lb to 3 or 3.5 lb is not producing such an overwhelming benefit as to offset the potential problems it could cause. Instead of believing that merely reducing the pull weight of your trigger will turn you into a world competition shooter, get out to the range and train with the gear you have. Learn how your gear functions and you will become a far more efficient shooter with practice, than just changing out gear.
Remember that many companies who produce aftermarket triggers or connectors that reduce pull weight will sell them with an advisement stating the trigger is designed for competition use only. In other words, these companies transfer the liability to you, and if questioned in court, will indicate that they never intended their product to be used in a self-defense pistol.
Be Able To Back-Up Your Decisions:
Any modification you make to your firearm, make sure you can articulate why you needed to make the modification. Being able to explain exactly why the modification makes the gun safer for you to use, and thus ultimately safer to the general public can help the jury understand why what you did was responsible and not reckless.
If you haven't guessed for all these reasons, I recommend not modifying the trigger pull weight on your carry gun. The factory specifications are more than acceptable for balancing accuracy, safety, and speed. If you don’t like the feel of the factory trigger on a firearm you are looking to purchase as your carry gun, and you can't make it work with simply changing out the shape or composition of the trigger, or using a polished set of internals, maybe look into a different firearm.
If you are intent on modifying your trigger, please do it the right way and replace the trigger group with an aftermarket product. This way, if you find that it is something that does not feel right, you can change it back. Or have a trained gunsmith do the work so everything functions the way it was designed.
As always, focus on your training and stay safe.