M-3 Grease Gun .45

Yes, in the 80's I fired one on several occasions in the Cav. At the time, they were still issued to armor crews. I found them to be very reliable and if aimed, accurate out to a bit past 50 meters.
 
In 1955, I was coming back from a supply run from the QM at Yongdongpo. My shotgun guard, Mousie, was in the back of the deuce and a half with a grease gun. When we stopped at an intersection, a Korean slicky-boy jumped in, with the usual intent of throwing boxes out on the street for his buddies to grab and run.

Mousie cut loose.

Messy.
 
interesting how the bolt stays back before firing...much slower than the Thompson which I would imagine would be a positive.
 
I have the MAC-10 (uses the same magazine) in semi-auto.
Still M/T a mag in about 12 seconds.

Saving for an UC9 to make it less expensive to shoot.


Doug
 
interesting how the bolt stays back before firing...much slower than the Thompson which I would imagine would be a positive.

That's an open bolt operation. The advantage of the open bolt design is that you decrease the possibility of a cook off during sustained firing (also the same way on most LMG's/MG's).
 
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interesting how the bolt stays back before firing...much slower than the Thompson which I would imagine would be a positive.
That's an open bolt operation. The advantage of the open bolt design is that you decrease the possibility of a cook off during sustained firing (also the same way on most LMG's/MG's).

hmm interesting thanks!
 
A Grease Gun story.

I went to watchmakers school with a WWII vet.
He told me about being an MP in Colorado before shipping to Europe for D-Day.

He said that one morning they were ordered to bring their Grease Guns to a warehouse.
They were loaded onto a large flat bed tractor trailer and driven down to the Denver mint.
The flat bed was loaded bags of silver dollars.
They drove through downtown Denver sitting on the bags of silver dollars with loaded Grease Guns.

The silver dollars were used to pay the soldiers at an Army post before being given their last leave before shipping out.
He said your pockets were about to tear out from the weight of the silver dollars they were paid with.

He said that almost every dollar was back in the mint within about 3 days.
 
I have fired it several times,and I have to say it's a handfull of fun as the Mac 10 (fully automatic), and the Thompson. Of the three the Mac10 was the fastest, the M3 was the coolest, and the Thompson was sweet also. Totally " happydays" when firing these dudes!!:D
 
The advantage of the open bolt design is that you decrease the possibility of a cook off during sustained firing (also the same way on most LMG's/MG's).

And you could take that a step farther and say helping it cool faster in general, which is a huge benefit.. although if you have sustained fire for any length of time you know you're gonna be breathing in smoke from your lubricant getting burned.. not fun at all. It also means you never have a loaded round in the chamber with the bolt closed.

Mousie cut loose.

Great story, made me laugh.. what happened to all the good nicknames though?
 
I wouldn't mind owning one, but given the choice of a grease gun over the UMP I'm afraid I'd go with the UMP.
 
Firing from an open bolt also decreases the overall design complexity of the weapon. In essence, it becomes a slam-fire weapon with a fixed firing pin.

As originally designed the Thompson used a hybrid method of firing from an open bolt in which the bolt, on closing, activated a hammer that swung forward and hit the firing pin to fire the cartridge.

That system was overly complex and during World War II the Thompson was redesigned to use a fixed firing pin. Complexity was signficantly decreased, it became cheaper and easier to manufacture, and reliability didn't suffer one bit.
 
One time in the Guard, I had to expend 2000 rounds of match-grade .45 ammo, so I grabbed a couple of M3A1s from the arms room (we still used them for armored vehicle crewman).

I'm not sure which was cooler: Actually firing them, or just walking around with them all weekend at the base.

I have a favorable opinion of the grease gun. It's compact, handy and I don't remember having any stoppages. Mechanically, it's simple, safe and sturdy. I would definitely like to carry one, but only because it looks so cool.

It has a perceptable locktime, so that you pull the trigger and wait for the bolt to "ker-thump" forward. Firing was controlable, and it was fun to blast away: "K-chunk, K-chunk, K-chunk...".

For a "Dirty Dozen" kind of mission, kicking in doors and spraying rooms, I think it's great. More of a PDW than a real offensive weapon.
 
I fired my M-3A1 in Germany in 67 / early 68 quite a few times. Interesting but no where near as fun to shoot as my TC position weapon, a M-2 50!!!

As stated, all of us tankers were issued the things. We even were issued them when I got to RVN in Sep, '68 but soon traded them for M16A1s which were a pain to store in our M48.
 
I ran over one, once upon a time.

Leading a platoon of tanks down a large hill, I must've thought I was Rambo, because I had my M3A1 slung over my shoulder and the gun was outside the turret. That crappy cotton sling parted and my gun slid down the side of the turret to the road below. Second tank couldn't stop and rolled over it. Third tank got it with the left track.

I got the column stopped, collected the parts and continued the march. When we got back into garrison, I took it to the supply sergeant to turn in. He looked at it. "We got a problem here, Lieutenant. We can either do a Report of Survey, which is going to take reams of paperwork and three months, or someone can admit responsibility and pay the government for this crappy little gun."

"How much?" Asks I.

"I'll check." says he.

Long story short, the government depreciated that M3A1 and I wrote a check to the Treasurer of the United States for the princely sum of $4.67.

I wish I could buy a case of them for that amount.

It has a perceptable locktime, so that you pull the trigger and wait for the bolt to "ker-thump" forward. Firing was controlable, and it was fun to blast away: "K-chunk, K-chunk, K-chunk...".

I had forgotten about that. K-chunk, K-chunk, yeah, those were good times.
 
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Fired at roughly 400 rounds a minute. Once you got used to the trigger you could easily fire single shots, or doubles or triples without really thinking about it.

I fired one a couple of times some years ago and they were a lot of fun.
 
The M3/M3A1 fire from the open bolt. They have a fixed firing pin. The only way you can have a round in the chamber with the bolt closed is if the round fails to fire. I worked on Grease guns as a small arms repairman in the 70s in Europe. Rugged little beasts, generally. Slow rate of fire, compared to other SMGs. The only things that go wrong with them is bent stocks, and the tab of the spring that locks the barrel nut in place can break off.

The "safety" is the ejection port cover. There is a tab that sticks down, and holds the bolt in position (either open or closed) when the cover is closed. Rarely these do break, but only rarely. Any time you see a Grease Gun with the cover open and a mag in the well, it is dangerous. We have proven many times that a sharp jar to the gun with the bolt forward (cover open) can jar the bolt back far enough (without going back far enough to be caught by the sear) to strip a round from the mag and fire it when the bolt goes forward.

A simple design, constructed mostly of heavy stampings (made buy the Guide Lamp Division of GM, the people who made car headlights before the war), it is rugged, durable, accurate enough for close range, lighter and handier than the Tommygun. ALso a LOT cheaper. The govt reportedly paid a whopping $17.50 each when new. So I find the story of the depreciated one being $4.67 quite likely.

Grease gun mags are stout, and have heavily constructed feed lips, seldom giving any trouble (unless run over by a tank:D), the bolt is massive, weighing nearly as much as the entire rest of the weapon, or seeming to. They are an effective close combat weapon, crude appearing, cheap to make, pretty durable (tanks excepted;)) and a great value to the military for the money.

I don't know if any are still in front line service today, probably not. But 40 years ago, they were still the arm for armor crewmen, and I got to say, that if someone was trying to climb on/in my tank, I'd much rather be able to grab a grease gun than any M16 variant.
 
The M3 was the second full auto firearm I shot.

The first one was a Thompson. The Thompson had the famous silhouette and the cool factor was high. I shot the M3 better because the rate of fire was so much slower.

Later, I shot a suppressed M3 in a side match called, Raptor Road, at the old Second Chance Bowling Pin Shoot. The clank of the 230 grain FMJ rounds hitting the steel targets was louder than the suppressed M3.

If I could, I'd own an M3. Unfortunately, the guns that cost about six bucks to be manufactured cost an arm and a leg now. Not many made it out of government hands into the private collectors sector.
 
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