M14/M1A Trigger Job


The most important modification, one that will help you actually shoot better, is a good trigger job. An accurate rifle won’t be much help if you can’t pull the trigger without moving your rifle off your point of aim. A proper match tuned trigger will help you get your shot off without moving the rifle all over the target and launching bullets into the ozone. A proper trigger will break cleanly at just a shade over 4½ pounds of total pull. I say total pull because a good portion of the weight of pull will be taken up in the first stage. This makes the added weight you apply to fire the shot from the second stage feel much lighter than it actually is. Your concentration will be on the second stage. You won’t even think about the pull on the first. The trigger must also have almost no creep in the second stage as the sear releases the hammer hooks. It’s the creep that gets you out of sorts when firing the shot.

Hitting the bulls eye is easy - or so I’m told. All you need to do is breath, relax your lungs, align your sights with the target and pull the trigger without moving the sights off the target. Sounds simple enough. Then there is that lousy trigger - the one that grates along and doesn’t release… and doesn’t release… and…
Boy it’s hard to keep these sights on target. The darn frame is 6 feet square and I can’t even keep the front sight on it, much less the black. Bang! What, a six? I didn’t call that shot. I couldn’t even concentrate on anything but getting that stupid trigger to let go!

Speaking of calling shots. It’s like bowling or golf. The important thing to do is follow through. There’s been lots of guys complaining about getting double shots. They often think they have a bad trigger when the problem is trigger control. Follow through is what you do to make sure you don’t get double shots, but it’s also vital to being able to “call your shots”. It requires that you do several things when the rifle fires. Shutting your eyes and wondering where the shot went isn’t one of them. Neither is yelling “come back”!

Proper follow through involves keeping your eyes open, holding the trigger back, rolling back with the recoil, while concentrating on exactly what you saw as the sight picture when the shot fired. The mental image you have of the sight picture or alignment in that instant will tell you where you should have hit the target. If you call a 10 at 3 o’clock and it come up a 10 at 3 o’clock, you’ll know that you got the shot off well and the sights are adjusted exactly where they need to be for the prevailing conditions. If you call the shot a 10 at 3 o’clock and the target comes up with a 9 at 9 o’clock, you’ll know that you either need to adjust your sights or you made a bad call. Of course if you are shooting M80 Ball ammo rather than M118 Match ammo… any WAG will do.

The important thing to know here is that without a good trigger your follow through will suck and you will have little control over the rifle. Something to keep in mind. Another thing to keep in mind is that it is best to leave getting your trigger adjusted to a professional armorer. Don’t try to do this yourself unless you have had some training or experience. I have a fairly extensive reference library that includes several books dedicated to the repair and modification of the M14 rifle. One thing they all have in common is a telling lack of information when it comes to adjusting the trigger. It may be a liability issue (even qualified gun smiths are very careful in this area). Most only touch on careful honing to smooth up the trigger pull and none mention touching the hammer hooks to eliminate second stage creep. It’s almost guaranteed that an inexperienced person will ruin at least one hammer while learning the proper procedure. My best advise is leave it to someone who knows what they are doing.

By Ted Brown
Shooters Den

 

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