K'nex M3 Grease Gun




About: My name is Tarkan. I am a Turkish citizen. I was born in London, U.K. I speak three languages (turkish, english and arabic) and am learning german and russian. I do my best to help people out. If you have ...

M3 (grease gun)
Used by The Allied Forces in WWII and the Americans in the Vietnam war.

My first K'nex gun with mag.

God only knows which jarhead designed this gun but still im making it b'cause its popular.

K'nex version, detacheble mag, real trigger, bolt action:
(fire, pull, fire, pull..........)

10 round detacheble mag,
Real trigger,
Shoots little green rods,
Mag. attacheble and detacheble,
Reloads real easily (5 seconds reload)
Can shoot up to 10 ft. depending on enviroment issues,
Is worth building.

Reloading THE MAG (putting the bullts in) takes a while,
Gets jammed very RARELY,
You need to break a dark grey connector (i already broke it when i put on too many lastics on it [DO NOT TRY!!])
Stock isn't very attractive.

Step 1: Body

Step 2: Handle

Step 3: Trigger

Step 4: Firing Pin / Pusher

Step 5: Mag.

10 round mag.

Step 6: *Optional* Stock

Step 7: Pull, Fire

Should click twice when firing pin is pulled: the first is the bullet entering the chamber, the second is the trigger going in place.

If the gun does not fire pull the firing pin all the way ( not out ) push the magazine pusher in ( happens alot when weak or old lastic is used ) and try again.



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    9 Discussions


    4 years ago

    Well this is very interesting! Like Lucas siad earlier, glad to see you try adding a removable magazine to you're gun. I'm also happy you tried a new mechanism.
    I don't knkw whether or not you read the comments on your ibles or not, but if you do I have a question for you.
    Your slingshot mechanism you used on the last couple guns was truly unique, and I find that really awesome in this community. I was curious if you would be willing to make a performance gun based on that system. A performance gun is a gun purely based on maximizing performance, and I want to know what that mechanism is capable of.
    More models like this one are fine too. Great job! I'll be waiting to see what you come up with next.

    5 replies
    Doc PenguinJonnyBGood

    Reply 4 years ago

    Good day Mr. BeGood

    Are you asking for my slingshot mech. to be used on a gun with a mag??

    JonnyBGoodDoc Penguin

    Reply 4 years ago

    Nope! (Glad to hear you talking!) I was referring to you maybe making a gun (single shot) that maximized the efficiency of your unique slingshot mechanism. See if you can get it to shoot 60 feet plus!

    Sorry if I confused you earlier, I tend to ramble.... a lot. I can't wait to see what you come up with!

    Doc PenguinJonnyBGood

    Reply 4 years ago

    A long range gun with slingshot mech but it depends on length. Allow me to explain;

    For more slinshot power you need the gun to be longer and you need more white and orange connectors. As a substitute i would make it with blue and yellow connectors. BUT this is a problem because blue connectors used as white substitutes slow down the projectile from a little bump sticking out them.

    I would try my best with a sniper rifle....

    Good dey

    Doc PenguinJonnyBGood

    Reply 4 years ago


    Did my best
    Also if lastic band is too tight the lastic will break.

    And as in my bio i said i do my best to help people out so i read the comments to make better and easier instructables.

    Good day

    Lucas The Boss

    4 years ago

    Glad to see you made your first gun with a mag