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  • M3 Grease Gun Magazine M3 Grease Gun Magazine
  • Grease Gun Magazine - Feed Lips Grease Gun Magazine - Feed Lips
  • D Cut Grease Gun Magazine D Cut Grease Gun Magazine

M3 Grease Gun Magazine

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So, you have a United States Submachine Gun, Cal. 45, M3 do you? And you say you are looking for some magazines? Well, you have come to the right place, because if it is M3 Grease Gun magazines you want, it is M3 Grease Gun magazine you get. Oh and here is the kicker: our M3 Grease Gun magazines actually work!

Availability: In stock

$29.95
  • Buy 10 for $24.95 each and save 17%

Each Keepshooting.com magazine, including our brand new M3 Grease Gun magazine, begins with a guarantee. Our goal prior to production is the manufacture of a magazine that is not only 100 percent functional, but also 100 percent reliable – a goal that took several years to reach with this particular magazine. As such, we guarantee the function and reliability of all of our house-brand magazines 100 percent. If for any reason you are unsatisfied with the performance of your magazine, it can be returned for a refund of the purchase price provided it is free from modification, damage and visible signs of usage or wear.

How can we offer such a guarantee? Prior to release, a random sampling of every magazine we produce is rigorously field tested to ensure proper fitting, feeding and ejection. Not to mention, our magazines are manufactured using premium raw materials alongside modern manufacturing technologies. If this sounds expensive, that is because it is. But due to the number of magazines we have made, our prices are driven down and in turn passed on to you.

As noted, the M3 Grease Gun magazine is a detachable box magazine that boasts a familiar design based on the original military M3 submachine gun magazine, but with several much-needed improvement. As such, these magazines are guaranteed to fit and function reliably in any M3 submachine gun, including the M3A1 variant. This magazine is also compatible with the MAC-10 and its many variants and derivatives. The body of the magazine, which is designed to hold and feed 30 rounds of .45 ACP ammunition to your firearm, is constructed from hardened steel that has been fully heat treated. It also boasts a blued finish for enhanced protection against rust and corrosion. Additionally, both the steel spring and follower are precision manufactured to provide for reliable feeds on a consistent basis.

Features:
  • Patterned After USGI M3 Magazine
  • Holds 30-Rounds of .45ACP
  • Works With Any Gun Designed to Use USGI M3 Magazines 
SKU TI-0003
Manufacturer United Defense LLC
Gun Model M3 "Grease Gun", MAC-10, MPA-10, UZI - GG Lower
Ban Status Post-Ban
Brand KeepShooting.COM Products
Caliber 45acp
Condition Factory New
Construction Steel
Capacity 30rds
Finish Blued Steel
Restrictions No Sales To Restricted States
Returns Accepted Yes - Must Not Be Modified Or Visibly Used
  1. Couldnt be happier review by Rory on 1/15/2017
    Quality
    Price
    Value

    Been searching for this magazine for a long time. Found many but prices were very high. Found this site made my purchase and couldn't be more happy. Great product packaged with care and in perfect condition for a great price.

  2. Awesome mag review by Todd on 9/7/2015
    Price
    Value
    Quality

    I just bought 2 more for my AR-45 because how impressed I am about the quality (they are metal and made very well) and the price.
    If your weapon accepts these mags, don't hesitate to buy at lease a few. You won't be disappointed.

  3. No mod mag for MPA10T pistol review by Brett on 8/17/2015
    Quality
    Price
    Value

    Ordered the grease gun mags on a thursday, received them the following Monday and only selected the cheapest shipping at $10 for the 3 mags. Outstanding order processing and shipping. Usually I have to wait for other companies to process your order for at least a week or 2 and these guys get my order processed and shipped to me in 5 days which included the weekend. Just awsome. As for the magazines themselves the over all continue looks great (after cleaning the grease off) they all fit my Master Piece Arms MPA10T just as good as my factory mag and even though I did NO altering to the mags I couldn't pull them out of the mag well even forcefully. I only put 10 rounds thru each mag (ammo costs prevented me from doing a full 30 Rd per mag function test) with only 1 false to feed which was my fault for not fully seating the mag. My gun ran like a champ with them so now I'll be on to loading a mag up fully and letting it sit for a month or so and see how it feeds then. Other than that for the $15.95 these mags are you can't go wrong if you are gonna run them in a MPA10 varient in my opinion. Can't wait to see if they get any sten mags back in to try out in my MPA30sst. Figures crossed :)

  4. bought more review by John M on 5/16/2015
    Price
    Value
    Quality

    These worked well in my mac 10 semi build. Had to buy 6 more before price went up! Cant go wrong for $15.95 and they work well, and they're new.

  5. Great magazine review by Charles on 5/13/2015
    Price
    Value
    Quality

    I had a military mag that wouldn't work in my Vulcan V10-45. This mag worked great!

  6. These work flawlessly! review by OCR on 4/16/2015
    Price
    Value
    Quality

    These work flawlessly in the MAC 10 during both semi auto and select fire. I've never had a problem with them during loading or 'unloading' at any rate of fire. I would not hesitate to buy more of these. I prefer them to the originals and I recommend them to friends with MAC 10s.

  7. Better than MPA10sst original factory mag. review by Michael on 4/11/2015
    Price
    Value
    Quality

    I was looking for a cheaper mag for my MPA Mac 10 45 and I happened to run across these on sale for $15.95. I was really impressed with the quality of these mags. They are well built and have a nice blued finish. They look and seem better built than the orginal mag that came with my gun. The Masterpiece Arms web site wanted $35,95 plus shipping for their mags. These are cheaper and better quality.

  8. Best M3 Magazines review by JB on 7/1/2014
    Quality
    Price
    Value

    Five-Star all around!!! Brand new and oily in sealed bag. Fit my M3 and M10 perfectly. Excellent buy (may need more in fact). Thank you! JB

  9. Work great! review by Desperado on 6/16/2014
    Value
    Quality
    Price

    I bought ten of these magazines and each one functioned flawlessly with the Lage thumb release grip for my M10/45. Great fit and finish on the magazines, so much nicer than the surplus originals.

  10. Great Mags review by RemMax on 3/7/2014
    Quality
    Price
    Value

    I originally bought these to use in my Uzi with a aftermarket grip handle that allows the use of GGMAGS AND THEY WORK PERFECTLY IN THAT GUN
    I recently built a AR45 in 45ACP and with the use of a custom lower that has a mag well that's made for GG mags these mags are feeding it perfectly as well
    Overall really nice mags that fit and feed flawlessly
    I will definitely be buying more of these in the near future
    Thanks KS

    RemMax

  11. Good Product review by Robert on 3/4/2014
    Price
    Value
    Quality

    I bought 10 of these for an AR15 pistol in 45 ACP. For this application they had to have a notch milled in the left side and the back of the magazine and the forward part of the feed lips had to be filed down for bolt clearance. They were full of grease and had to be thoroughly cleaned but they performed flawlessly once they were adapted to the Bazoka Brothers lower.

  12. Amazing review by Curt on 1/25/2014
    Price
    Value
    Quality

    I purchased a Masterpiece arms carbine and bought 6 of these mags for it. I had heard horror stories about grease gun mags and was expecting the worst but once on the range the word Flawless came to mind.. I ran through over 200 rounds without one malfunction and will be buying more of these quality magazines

  13. very nice good deal review by mark on 12/7/2013
    Price
    Value
    Quality

    nice buy.

  14. Excellent review by Ry on 12/6/2013
    Price
    Value
    Quality

    Great quality. Came in protective plastic.

  15. Superior to OEM Magazine review by David on 9/6/2013
    Quality
    Price
    Value

    I just received my order of two magazines yesterday... and I am highly impressed with KeepShooting. This product is superior in every way relative to the original MPA 30rnd mag provided with the firearm. The fit and finish is clean, the rounds feed without any issues, and the construction is solid.

    I placed my order on a Saturday (holiday weekend, 31AUG), and the KeepShooting order tracking system kept me informed of the progress of the order as it was processed on the next business day, shipped, and tracked (via USPS).

    So, a better product, excellent service, simple and easy order process, what more can you ask for? The price from KeepShooting – is about 40% of the OEM… Need I say more?

  16. Not perfect right out of the box review by sloppydogdrool on 6/18/2013
    Price
    Value
    Quality

    I bought 10. Some were a little tight fitting. Several would not load or feed properly. The follower kept getting stuck. I finally after loading and unloading a few dozen times was able to get the follower to move freely and the magazine started feeding properly. I'm dropping the quality to 4 stars since production seems inconsistent. I've only been through half the box at this point and I still have one mag that refuses to feed smoothly. Oh get the speed loader. Loading by hand royally sucks!

  17. work good review by Marcel on 4/30/2013
    Value
    Quality
    Price

    these things are awesome mags, vary heavy when loaded

  18. Run Beautifully review by RemMax on 4/19/2013
    Price
    Value
    Quality

    These fit and function in my 45 Uzi better than half the Mil-Surp mags I have, Plus they match the Uzi finish!
    When I bought my 45 Uzi SMG, the only mags you could get for it was the 16 round Uzi Mags. Using 16rnd mags in a sub gun gets frustrating changing mags! And then the price of those 16rnd mags on top of it.
    When Vector Arms came out with the replacement grip that converts your 45 Uzi to use grease gun mags I thought I finally had it made, Of course Mil-surp GG mags weren't so cheap or easy to find then either. When I found these I only picked up a couple to try them out, Once I took them to the range I was sold! These fit right in the mag well and feed the gun as fast as it can spit em out! Having them match the color of the gun don't hurt either.
    I'm planning on building a 45acp Upper for one of my spare AR lowers this summer and when I do these will be the mag I use to feed it.
    No worn out springs, dented mag bodies or bent feed lips on these, they are 100% brand new and work like it accordingly The best part is they cost about the same price as the questionable "Un-Issued" Mil-surp mags you run into using the originals and finding a new spring for a GG mag is not a casual chore!
    If you have anything that uses GG mags these are the way to go.
    RemMax

  19. Fantastic item review by DAINESE on 4/15/2013
    Quality
    Price
    Value

    you will not find a mag as good as these a++++++++++++++

  20. very nice review by DAINESE on 4/13/2013
    Price
    Value
    Quality

    i am getting more of these works good in my mpa 45 thank you.

  21. Great for Grease Gun review by Jacob on 4/9/2013
    Price
    Value
    Quality

    All 6 functioned great in my M3A1 Grease Gun. The tolerances of these magazines are spot on. I would buy more if they were available parkerized.

  22. better than the stock magazine review by DAINESE on 4/3/2013
    Value
    Quality
    Price

    great item fast shipment

  23. Fantastic item review by DAINESE on 3/28/2013
    Value
    Quality
    Price

    I purchased 2 of these to check out the quality. Once I received them, I immediately got on phone and ordered 4 more. Don't hesitate on buying these mags, they are the BEST out there. If i could have rated them a 10, I would have.

  24. Much better than original GI review by Phil on 3/23/2013
    Price
    Value
    Quality

    I've seen lots of M3 mags and these are by far the most consistent, best made, best fit, best materials, best quality of all I've seen. Thanks!

  25. Outstanding product! review by Andrew on 2/14/2013
    Quality
    Price
    Value

    Ordered one earlier and waited a bit to receive- the wait was worth the price. I expected some cheap knock-off but was surprised by the quality and the fact that this mag came NIW. I look forward to purchasing another mag at this price. Thanks, your efforts are appreciated.

  26. great mags review by Xavier on 2/9/2013
    Quality
    Price
    Value

    Buy as many as you can I received my order quick. These mags are great don't waste your time buying other mags like I first did these are the mags for your Mac-10!

  27. Built Well! review by StillKicking on 1/27/2013
    Quality
    Price
    Value

    These are great mags for a good price.

  28. EXCELLENT review by LEE on 1/18/2013
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    Value
    Quality

    AWESOME QUALITY!

  29. mpa grease mag review by james on 1/13/2013
    Quality
    Price
    Value

    great mag works great, arrived seal in grease in plastic. should of bought more.

  30. M3 GG Mags for AR45 review by Deanno on 12/27/2012
    Price
    Value
    Quality

    I have built a set of AR45's that use the M3 GG Mags, I have to say that over all I am very pleased with all their performance. Sure I had some issues, with a small few of the mags, but with a little adjusting... (if you know what you are doing) they all worked just fine. Not one of the mags I ordered I could not get to work with out a problem. After fit adjustments, not one jammed on me. I would say about 20% needed some work, but over all Money well spent.

  31. M3 GG Mags for AR45 review by Michael on 12/27/2012
    Price
    Value
    Quality

    I have built a set of AR45's that use the M3 GG Mags, I have to say that over all I am very pleased with all their performance. Sure I had some issues, with a small few of the mags, but with a little adjusting... (if you know what you are doing) they all worked just fine. Not one of the mags I ordered I could not get to work with out a problem. After fit adjustments, not one jammed on me. I would say about 20% needed some work, but over all Money well spent.

  32. QUALITY...all the way review by enterprise56 on 12/26/2012
    Price
    Value
    Quality

    KS.....awesome mags guys. Waiting for more.

  33. Perfect review by Brent on 7/2/2012
    Value
    Quality
    Price

    Perfect fit for my MPA10SST. Even better than the stock magazine....not too loose and not too tight. It came with a nice coating of oil and in a sealed plastic bag. Good job KS!

  34. WOW THEY WORK!!! review by Matthew on 6/14/2012
    Quality
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    Value

    used in my MAC-10 one had paint that was a little bit too thick but a quick sand took care of that, the rest were all GTG! no issues with any of them so far....

  35. finally a mag that works :-) review by billy in oklahoma on 5/20/2012
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    Quality

    finally a .45 mag for my masterpiece arms mac 10 that works ......iv never had any problem with thes mags and im sure glade i bought one when i got my mac cause my factory mag quit working right after i got it ............i ordered another one from masterpiece and it was junk as soon as it arrived .....it took awhile to finally find a place that sold a good mag but it seems Keepshooting.com is the only place that sales this mags.....ill be ordering more :-)

  36. Great mags. review by ROBERT on 3/12/2012
    Price
    Value
    Quality

    If you have an older M-10 before MPA you'll have to change your mag catch to accept grease gun mags. Very simple to do and takes only a few minutes. I believe an m-11/9 mag catch will work. Worked flawlessly with my semi m-10. Great fit and finish.

  37. These Mags ROCK review by 5StarGeneral on 3/5/2012
    Price
    Value
    Quality

    I just received my F4 for my PS M10/45, bought a couple of these to test if my MAC functioned well with them. I should have bought a few more while they were in stock. These mags rock, can't wait to order 3-4 more.....

  38. Excellent magazine review by Stephen on 11/27/2011
    Quality
    Price
    Value

    I ordered a few of these for my Volunteer Enterprises Commando. They worked perfectly. I have a few genuine issue M3 mags, and except for age and wear, I can't tell them apart. I highly recommend getting the M3 mag loader as well, as your thumbs get very sore reloading if you shoot them a lot.

  39. MPA MAC 10 shooter review by GI Joe on 11/19/2011
    Quality
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    Value

    Great Magazine. Tight fit no rattle.. About a ten round break in each magazine, then they will feed without issue. I have a cute little bump firing rig, I use which is nothing more than a sized to length lanyard that clips unto a belt loop, providing the proper distance to the trigger finger, to bump fire from the hip accurately. These mags will empty in under 1.5 second of bump fires reliably. LOVE THEM!

  40. great mags review by root on 11/4/2011
    Quality
    Price
    Value

    I have a huge pile of these now and they work 100% ALL OF THEM!
    No wondering if they are going to fit or function like the WWII GG mags I have bought in the past.
    these mags lock right up and run great. they are being used in a 40 YO PS Mac 10 sub machine gun and empty out in 1.2 seconds on a mag dump.
    again nothing but praise for these mags.

  41. decent magazines review by dave on 9/21/2011
    Quality
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    Value

    like the mags a lot. wish they were a little cheaper but as with everything i've bought so far from these guys i can't complain. have yet to receive something i didn't like and that's hard to say about most companies! if they keep up the great work, I'll keep buying more stuff!!!

  42. 5 STAR MAG !!! review by MR MAC 10 on 8/12/2011
    Quality
    Price
    Value

    The mag fit and function flawlessly in my Master Piece Arms MPA10T . Slow fire Bump Fire NO PROBLEM!! BUY IT !!!

  43. Great Grease Gun Magazine!! review by PT-13Pilot on 6/23/2011
    Quality
    Price
    Value

    I bought one of these for a Volunteer Commando Mark III (Tommy gun clone). The magazine looks well made, and finish is superb. Took no modification or tweaking, just slap it in and go shooting. I will be ordering more! Much better option than new/used USGI mags of questionable quality.

  44. decent mags review by dave on 6/5/2011
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    Price
    Value

    work great, have 5 so far, may get more...

  45. 15 bought, no complaints review by sanuces3rd on 4/24/2011
    Quality
    Price
    Value

    I've bought 15 or so this year and have nothing but praise for these mags. The price, quality and dependability are awesome. All mags have been used with not a single misfeed, jam, or pause. Thank you KEEPSHOOTING!

  46. best I've found review by cpt. caveman on 4/24/2011
    Quality
    Price
    Value

    The fit and function of these mags is excellent. They work in my mpa10 flawlessly. Great item for a good price. Get some!

  47. overall excellent review by joker on 4/23/2011
    Quality
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    Value

    great price plus excellent function equals outstanding value. functions flawlessly in my mpa10.

  48. Excellent product review by Happyface on 3/26/2011
    Quality
    Price
    Value

    I bought 5 of these because the price was so much lower than I found anywhere else. After talking on the phone with one of the customer service people, he quieted my concerns that they might be like so many other "cheap" magazine products out there. These are beautifully made, flawless in function and at a great price. Even when bump-firing my M10 they hum like a machine and no jams. :-D

  49. Vector 45 Uzi review by Pennsniper on 3/20/2011
    Quality
    Price
    Value

    These mags run better in my Vector 45 Uzi than original grease gun mags. Best thing is they required no modification at all. Thank you Keepshooting.

  50. These mags will save you $$$ and time review by ftldrben on 3/7/2011
    Quality
    Price
    Value

    These are the best deal out there and they are NEW! I was paying upwards of $65 for 30+ year old GG mags that may have been new in wrapper (but so are mummies) but the looked old and functioned at about 80%.
    These run 100% albeit must be tuned to fit my unmodified M10/45 magwell. I use a 3 sided file an fit each mag to the weapon with about a 1/8" shave off the mag catch on the back of each one. Doesn't take long and gives me perfect mags for my M10!

  51. Almost perfect review by Ganjatron on 3/4/2011
    Quality
    Price
    Value

    These are definitely the best grease gun mags I've found. Compared to the ones that came with my MPA-10, these are lighter, have a nicer finish, weigh less and do not wobble in the mag well. The only complaint I have is that I wish they had a window drilled at the bottom so you can see if the mag is full or not.

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