M3 Grease Gun Turned into Police Dept

A Redditor posted recently about an M3 Grease Gun that someone found in their attic that was turned into the local police department. Don’t worry though, the department is trying to find a museum to take it so it doesn’t end up melted down.

somebody found this in their attic while laying down new insulation. they turned it in to the PD he works at. Sadly, it was never registered pre 1986… anybody here ever go through this process to save an old gun like this? we could use any help finding a place to take this. I live in MA

The M3 Grease Gun is an open bolt blowback operated sub machine gun chambered in .45ACP that was adopted by the U.S. Army back in 1942. It was a lighter and cheaper replacement for the Thompson submachine gun. Around 700,000 were produced for the war effort and it was used well into the 1990s aboard armored vehicles in the Gulf War. They’re actually still in use by the Philippine Marines with some upgrades.

Ray I.

Long time gun enthusiast, archery noob, Mazda fan, Sci-Fi nerd, Whiskey drinker, online marketer and blogger. My daily firearms musings can be found over at my gun blog ArmoryBlog.com and Instagram.

Shoot me an email at ray.i@staff.thefirearmblog.com


  • Victor Lourenço

    Well, at least they’re trying to find a museum for it.

  • Mike Smith

    It can be donated to a museum. A woman here in GA discovered a Welrod and a silenced Hi-Standard HDM-S after her WW2-veteran husband died. There was no paperwork, so she contacted the local Sherrif’s office. A knowledgeable and forward thinking deputy knew the rules about donating to a museum, and arranged for her to donate these two rare WW2 pistols to the Infantry Museum at Ft. Benning GA.

    Interestingly, that Grease gun appears to have had a professionally made cocking handle mod performed.

    • Yeah, it’s missing the rotary charging handle of the original, and has had a cocking slot and handle added.

      • J.T.

        I have seen pictures of a couple other grease guns modified like that. There is one in The National Museum of Military History in Luxembourg that has the charging handle modification and another was found in Normandy about 8 years ago. They all look pretty consistent so my guess is that it was something done by armorers to get guns with broken cocking levers working again.

    • Fruitbat44

      Thought there was something different about it.

  • Ed

    Still in some Spec Ops inventories today.

  • TheNotoriousIUD

    I would have left it right up there in the attic.
    Might come a time when you can use an SMG if law enforcement breaks down.

    • RICH

      Amen, Bro !

    • Kivaari

      Well, clean it up really well, buy more magazines with pouches and LBE. A couple thousand rounds of ammo. All sealed up and protected for one of the SHTF days.
      I don’t think I’ll live long enough to see the retaking of America.

    • purple lips

      Might come a time when you can use an SMG if law enforcement breaks down your door

    • Michael R. Zupcak

      As cool as full auto is, most military and probably all LE personnel would be fine with Semi-auto only in personal firearms. Full auto shines in weapons like the M249 SAW or my favorite example, the M134 where you can lay down so much firepower the enemy has no choice but to take cover. I can think of countless semi-auto-only weapons that I’d rather have than an M3 grease gun in a life-or-death situation. Even a Glock 17 with 33-rd magazines and quality ammunition would be preferable in my opinion.

      • TheNotoriousIUD
        • Michael R. Zupcak

          Im sure its fun if you can afford it. I cant inagine owning a full auto AR or M16 and feeding $10 or $15 mags into it every few seconds. Being jn New York state, Ive never fired anything FA. If I ever go to Vegas…or maybe I should say when I go to Vegas Ill go to one of those places and try it even if its $4 or $5 a shot.

          • TheNotoriousIUD

            Its pretty dope.
            Luckily I grew up in Texas around a bunch of gun nuts so theres a couple of MG’s in the family.
            It does get expensive though.

    • Kurt Akemann

      I wouldn’t. 5-10 years in federal prison is no joke.

  • What Grease Gun?

    • Chriss Kyle

      M3 “Grease” Submachine gun

      • TheSmellofNapalm

        You’re an idiot.

        • Chriss Kyle

          you are intelligent??? hahahahaha :))

      • Heh. Not what I meant.

  • iowaclass

    How do we know it wasn’t registered? The NFRTR is a vomit omelet. I’d bring a declaratory judgment and put ATF to its proof.

    • Cal.Bar

      Great idea. Although given the Federal and State penalties for even possessing this thing, I;’m not sure I’d want to rely on them being unable to prove that it WASN’T registered., In order to get the declaratory relief you’d need a bit more than “I think grandpa registered it 35 years ago”

      • RICH

        At least they couldn’t question Grandpa about it.

  • TheNotoriousIUD

    I like how they orange’d out his chin like thats gonna make him instantly recognizeable.

    • RICH

      I’d ‘orange out’ about an inch at the end of the barrel and swear it was an Airsoft gun ……

    • purple lips

      That’s so you don’t see the powdered donut crumbs

  • mosinman

    Sad we can’t own these legally (unless they’re registered)
    At least the cops are trying to preserve it

  • Don Ward

    I refuse to click anything Reddit. What city was this in?

    • Anthony SugarLips Defrancesco

      Your a douch

      • Sianmink

        Well, at least you spelled ‘a’ correctly.

        • DB

          LMAO!! Thinking same thing….doesn’t like “e’s!”

      • Joe Hathaway

        What exactly is an “A DOUCH”? Who is it you think actually owns an “A DOUCH”? How do you know it is owned by him or her? It could be a rental or a loaned “A DOUCH”, no?

    • John

      It was found in the wonderful state of Massachusetts.

  • Mastro63

    That’s a dangerous gun. My dad’s best friend had one slam fire on him in Germany (West- back in the late 50’s). Killed him. DON’T drop or bang it against anything!

    • AJ187

      Keeping it pointed in a safe direction sounds like it would of saved your dad’s friend’s life.

      • Mastro63

        Sure- Insult a dead serviceman who tripped on night guard duty. Stay classy.

    • HSR47

      Among firearms designed to fire from the open bolt using a fixed firing pin, that’s common.

      It’s actually the reason many such guns have a safety notch at the rear of the channel that the cocking handle rides in.

  • RICH

    I wonder if they would like to place it in “My museum”…… ? ? ! ! Wow what a find !

  • Kivaari

    It is odd by having the charging handle on the tube. The original M3 had failures of the charging lever. I wonder if it was done in the field by an armorer, putting the gun back into service. It sure would be an easy alteration.

  • Kivaari

    In the late 50’s our sheriff put an ad in the paper saying they would pay $50 for any machineguns people had. No charges to follow. They ended up with Riesings and Grease guns. Maybe others, but that was awhile back.

    • purple lips

      Now those are in some deputies’ gun safes

      • Kivaari

        No, they were traded for Colt SP1s. The sheriff traded of all the WW2 guns, plus two Colt 1928 Thompsons, with full “kit” in the factory carry cases for 7 AR15s. Oh, the pain of that. The Thompsons were mint, except for the bores. Someone shot corrosive ammo, and didn’t clean them. They were factory engraved with the sheriff departments name. They also had a beautiful 25mm rotary gas gun and a .30-06 Lewis machinegun. All for SEVEN AR15’s that ended up in trucks of patrol cars getting rusty.

  • Graham2

    The cocking modification was quite common and kept an otherwise unusable M3 going. The M3A1 did away with the cocking ratchet completely and there was just a hole in the side of the bolt that you put your finger in. I’ve got a couple of photos of similar examples somewhere.

  • disqus_PDmXLtTxJj

    I’d punch 100 liberals in the face just to shoot it once.

    • Jwedel1231

      I would punch 100 liberals in the face even if I didn’t get to shoot it.

    • Mister Thomas

      You. I like you.

    • Cymond

      In all seriousness, Palmetto State Armory in Columbia SC will let you shoot 2 magazines for $50.
      Sadly, the day I went, the STG-44 was out for service and the Thompson was being used, so I settled for the M3, MP-5SD, and AK-74SU.

    • Vizzini

      That’s like saying I’d eat ice cream to get to eat ice cream.

  • purple lips

    How stupid do you have to be to give the cops anything other than a hard time?

  • Sulaco

    Neat gun. I got to fire one. Its a thumper in .45 and very slow roll as MG’s go. Looking it over I would almost say it was designed to be a disposable…

    • Cannoneer No. 4

      America’s Sten, designed on purpose to be cheaper than the Thompson. Still carried by tank loaders and drivers as late as the Gulf War. Might still be a few surviving in National Guard armor company arms rooms for M88 crews.

  • claymore

    With that large port cover looks more to be an M-3 A1 or a semi- auto clone that were made a few years ago.

  • Nicks87

    The cop in the pic needs to find a different place to attach his whisper mic for his radio. Too easy to get choked out in its current location.

  • Rock or Something

    Rock on with your greaser on.

  • Joe Hathaway

    I saw nothing in any of this explaining how an old weapon was turned into a Police Dept.! How did the writer manage to take a few pounds of material and convert it into a police building, a parking lot with police cars on it, and all the living, breathing human employees and officers in the department?

    Perhaps, if the author is fibbing, he should simply turn it in to an actual police department!