M1 Garand trigger assembly

Mi Garand Trigger Mech Parts that interchange with M14 Trigger Mech's

Questions on this come up often enough I thought it may be a good idea to start a thread on it. We have to break this down into a few sections.

Parts that directly interchange with no special fitting required.

1. Hammer.
2. Hammer Pin.
3. Trigger Pin.
4. Hammer Spring.
5. Hammer Spring Housing.
6. LATE WWII or later Hammer Spring Plunger that does not have the early Garand "ears" or "wings" on the sides.
7. Safety. Now the early Garand "flat top" safety will directly interchange and work, but they crack easier than the Mid WWII ones that are curved on the tops. So I suggest you leave the "flat topped/early" Safeties to collectors.
8. Trigger Assembly. Of course these don't have the wider sear that M14 trigger assemblies have, but if you don't have a legal FA capable M14, you don't need or even want the wider M14 sear. We cut/grind down ALL M14 sears to the width of M1 Garand sears for NM rifles. I do it on ALL M14 trigger assemblies I install in Semi Auto only commercial M14 rifles as well.

Part/s that fit after modifying the M14 trigger housing.

1. Early Garand Hammer Spring Plunger WITH the "ears" or "wings" on the side. I PREFER to use these in NM M14's and even have one in my "Walter Mitty" or SHTF rifle. HOWEVER, you have to cut/grind a half circle clearance cut on the right side of the M14 trigger housing so the ear on that side does not hit the M14 trigger housing.

I found that out over 25 years ago when I wanted to put an early Garand hammer spring plunger WITH ears on it in a Match rifle. The "ears" keep the hammer spring plunger nose more centered in the notch of hammer and it can't move side to side as much. That means the pressure is more consistant and gives you a more consistant trigger pull.

Now we almost never put them in the NM M14 rifles we built for the Marine Corps BUT the reason was they were no longer in the supply system (we thought) and no one knew about them. I "took a chance" some MIGHT still be in the Supply System under the older M1 Garand NSN, when I was stationed in California in the late 80's. I ordered 10 of them and got 6 with "ears, " so I put them in our NM M14's after modifying the housings. Not long afterwards enough parts came back from Korea on the civilian market, that I went out and bought enough for the rest of our NM M14's.

Funny thing was I have actually seen these plungers WITH ears and the M14 trigger housings modified for them in REAL M14's that Law Enforcement Agencies have received from Homeland Security.

Parts that DO NOT interchange between M1 and M14 trigger mechs.
1. Trigger Housings.
2. Trigger guards.
3. Safety spring or Clip Ejector on the Garand.
4. You SHOULD NEVER put an UNMODIFIED M14 trigger assembly into a Garand Trigger mechanism even though it will go in without any fitting. Garand stocks do not have the little vertical clearance groove just ahead of the rear bedding surface for the rear end of the trigger housing. That groove is meant so the wider M14 sear does not rub in the stock and cause the rifle to double, triple or go full auto.

Of course you CAN cut that vertical clearance groove in an M1 Garand stock, identical to the one on an M14 stock, but WHY do it? Just cut/grind the wider M14 sear down to M1 Sear width and then you CAN use the M14 trigger assembly in an M1 trigger mechanism, should you wish to do it.