3D Printable Airsoft Gun
3D Printable Airsoft Gun
3D Printable Airsoft Gun
3D Printable Airsoft Gun
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PURPOSE

When 3D printers started to dramatically drop in price and were thrust onto the commercial market, I was immediately hooked. This is every engineer's dream come true! The storm of cool printable products really hasn't developed as I expected however. Most people were, and still are, only printing little sculptures and vases. In terms of pushing this technology to its potential, we're not off to a great start! I came to the conclusion that it is not a lack of vision that is limiting the use of these desktop printers, but a lack of designs. People would print more awesome things if there were more awesome things to print. So I put two and two together and started designing this printable airsoft gun. It's the start of many designs I hope to produce for people who really want more than just a vase from their printers. I hope it will inspire you to get your creative mind in gear and contribute some awesome designs for a 3D printable future!

TOOLS

  • -3D printer (I used an UP PLUS)
  • -epoxy glue (and solvent if you have it)
  • -screwdriver
  • -drill (optional)
  • -pliers
  • -wire cutters
  • -hacksaw MATERIALS
  • -820g of ABS (just under 1 reel)
  • -nuts and bolts $10
  • -1m of 15mm OD metal tube $10
  • -bike pump $4
  • -spring $8
  • -2nd hand airsoft barrel $15
  • -spray paint (optional)
  • -small scrap of 20mm PVC electrical tube
  • -dead pens
  • -7mmOD irrigation tube
  • -2x Old couch springs or other extension springs GUN SPECIFICATIONS
  • -Shoots 6mm bb's (0.2g recommended)
  • -Single shot springer (spring powered)
  • -Chronoed at 250fps with 0.2g bb's
  • -Accurate to 20m, extreme range 40-50m
  • -Weighs a nice 1.2kg
  • -Mag capacity: 11 rounds
  • -Picatinny rails
  • -Adjustable hop up
  • -Working safety
  • -foldable bipod and sights (for scope if desired) DISCLAIMER______________________________________________

    I take no responsibility for your actions with this gun if you should decide to make it, or if you are not legally allowed to own such a gun according to the laws of your country and yet still decide to make it. This is an airsoft gun only, not a firearm, however it can do damage if aimed at the wrong place. Treat it responsibly and use the appropriate safety gear.

    That being said I do encourage you to have fun! That's what this gun is for after all.

    _________________________________________________________

    Step 1: PRINTING

    3D Printable Airsoft Gun

    First things first, parts need to be printed and cleaned.

    You will need just about a whole reel of ABS plastic (820grams). Haven't tried PLA, it is significantly weaker, but you can try if you want!

    Most of the 46 parts will fit within the print volume of a desktop printer (120mm cubed), but there are a few larger parts that will need to be printed on a larger printer with 200mm width/depth and 200mm height. This is inconvenient I know, my next gun will be designed fully for a 120mm cubed print volume. You could split them and glue them back together with solvent, but be careful about printing too large on an open bed, you may get warping.

    The parts are all designed to be printed in a certain orientation for minimal support material, strength in direction of the forces, and also to prevent layers grabbing between parts, i.e. layers are perpendicular for fast moving parts.

    You will see on the parts files that one side is coloured red- this is the side to be on the printbed.

    Most of the pictures explain the assembly well enough, but I will comment on the design details as we go. If you're confused at any point, have a look at the exploded view animation to see every nut and bolt put together.

    barrel_spacer.STL
    3D Printable Airsoft Gun
    barrel_spacer.STL18 KB base_plate.STL
    3D Printable Airsoft Gun
    base_plate.STL420 KB bipod_base.STL
    3D Printable Airsoft Gun
    bipod_base.STL125 KB bipod_foot_right.STL
    3D Printable Airsoft Gun
    bipod_foot_right.STL280 KB bipod_pivot_right.STL
    3D Printable Airsoft Gun
    bipod_pivot_right.STL125 KB charging_handle.STL
    3D Printable Airsoft Gun
    charging_handle.STL139 KB cylinder_head.STL
    3D Printable Airsoft Gun
    cylinder_head.STL41 KB flash_hider.STL
    3D Printable Airsoft Gun
    flash_hider.STL207 KB flash_hider_2.STL
    3D Printable Airsoft Gun
    flash_hider_2.STL276 KB front_sight.STL
    3D Printable Airsoft Gun
    front_sight.STL126 KB front_sight_fold.STL
    3D Printable Airsoft Gun
    front_sight_fold.STL299 KB grip.STL
    3D Printable Airsoft Gun
    grip.STL2 MB hop_cap.STL
    3D Printable Airsoft Gun
    hop_cap.STL80 KB hop_slide.STL
    3D Printable Airsoft Gun
    hop_slide.STL11 KB hop_unit.STL
    3D Printable Airsoft Gun
    hop_unit.STL221 KB lower_receiver.STL
    3D Printable Airsoft Gun
    lower_receiver.STL583 KB mag_base.STL
    3D Printable Airsoft Gun
    mag_base.STL54 KB mag_catch.STL
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    mag_catch.STL9 KB mag_latch_left.STL
    3D Printable Airsoft Gun
    mag_latch_left.STL127 KB mag_latch_right.STL
    3D Printable Airsoft Gun
    mag_latch_right.STL127 KB mag_left.STL
    3D Printable Airsoft Gun
    mag_left.STL308 KB mag_ram.STL
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    mag_ram.STL445 KB mag_right.STL
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    mag_right.STL344 KB picatinny_UR_front.STL
    3D Printable Airsoft Gun
    picatinny_UR_front.STL16 KB picatinny_UR_front_bottom.STL
    3D Printable Airsoft Gun
    picatinny_UR_front_bottom.STL101 KB picatinny_UR_main.STL
    3D Printable Airsoft Gun
    picatinny_UR_main.STL16 KB piston_catch.STL
    3D Printable Airsoft Gun
    piston_catch.STL379 KB piston_head_spacer.STL
    3D Printable Airsoft Gun
    piston_head_spacer.STL86 KB rear_sight.STL
    3D Printable Airsoft Gun
    rear_sight.STL193 KB rear_sight_fold.STL
    3D Printable Airsoft Gun
    rear_sight_fold.STL44 KB safety_lever.STL
    3D Printable Airsoft Gun
    safety_lever.STL64 KB sear.STL
    3D Printable Airsoft Gun
    sear.STL126 KB stock_base.STL
    3D Printable Airsoft Gun
    stock_base.STL312 KB stock_butt.STL
    3D Printable Airsoft Gun
    stock_butt.STL135 KB stock_shoulder_rest.STL
    3D Printable Airsoft Gun
    stock_shoulder_rest.STL689 KB trigger.STL
    3D Printable Airsoft Gun
    trigger.STL156 KB trigger_box_left.STL
    3D Printable Airsoft Gun
    trigger_box_left.STL209 KB trigger_box_right.STL
    3D Printable Airsoft Gun
    trigger_box_right.STL116 KB trigger_guard.STL
    3D Printable Airsoft Gun
    trigger_guard.STL77 KB trigger_link.STL
    3D Printable Airsoft Gun
    trigger_link.STL84 KB trigger_release_left.STL
    3D Printable Airsoft Gun
    trigger_release_left.STL91 KB trigger_release_right.STL
    3D Printable Airsoft Gun
    trigger_release_right.STL91 KB upper_receiver_front.STL
    3D Printable Airsoft Gun
    upper_receiver_front.STL225 KB upper_receiver_front_cap.STL
    3D Printable Airsoft Gun
    upper_receiver_front_cap.STL133 KB upper_receiver_left.STL
    3D Printable Airsoft Gun
    upper_receiver_left.STL59 KB upper_receiver_right.STL
    3D Printable Airsoft Gun
    upper_receiver_right.STL73 KB picatinny_UR_front_1.STL
    3D Printable Airsoft Gun
    picatinny_UR_front_1.STL9 KB picatinny_UR_front_2.STL
    3D Printable Airsoft Gun
    picatinny_UR_front_2.STL9 KB picatinny_UR_front_bottom_1.STL
    3D Printable Airsoft Gun
    picatinny_UR_front_bottom_1.STL22 KB picatinny_UR_front_bottom_2.STL
    3D Printable Airsoft Gun
    picatinny_UR_front_bottom_2.STL22 KB picatinny_UR_main_1 - Copy.STL
    3D Printable Airsoft Gun
    picatinny_UR_main_1 - Copy.STL10 KB picatinny_UR_main_1.STL
    3D Printable Airsoft Gun
    picatinny_UR_main_1.STL10 KB picatinny_UR_main_2 - Copy.STL
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    picatinny_UR_main_2 - Copy.STL9 KB picatinny_UR_main_2.STL
    3D Printable Airsoft Gun
    picatinny_UR_main_2.STL9 KB
    3D Printable Airsoft Gun
    barrel_spacer.SLDPRT90 KB
    3D Printable Airsoft Gun
    base_plate.SLDPRT344 KB
    3D Printable Airsoft Gun
    charging_handle.SLDPRT204 KB
    3D Printable Airsoft Gun
    cylinder_head.SLDPRT232 KB
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    DO_NOT_PRINT_2.SLDPRT1 MB
    3D Printable Airsoft Gun
    flash_hider.SLDPRT346 KB
    3D Printable Airsoft Gun
    flash_hider_2.SLDPRT620 KB
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    front_sight.SLDPRT367 KB
    3D Printable Airsoft Gun
    front_sight_fold.SLDPRT464 KB
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    grip.SLDPRT1 MB
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    hop_cap.SLDPRT298 KB
    3D Printable Airsoft Gun
    hop_slide.SLDPRT126 KB
    3D Printable Airsoft Gun
    hop_unit.SLDPRT909 KB
    3D Printable Airsoft Gun
    lower_receiver.SLDPRT2 MB
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    mag_base.SLDPRT231 KB
    3D Printable Airsoft Gun
    mag_catch.SLDPRT128 KB
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    mag_latch_left.SLDPRT197 KB
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    mag_latch_right.SLDPRT185 KB
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    mag_left.SLDPRT523 KB
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    mag_ram.SLDPRT200 KB
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    mag_right.SLDPRT1 MB
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    picatinny_UR_front.SLDPRT311 KB
    3D Printable Airsoft Gun
    picatinny_UR_front_bottom.SLDPRT406 KB
    3D Printable Airsoft Gun
    picatinny_UR_main.SLDPRT275 KB
    3D Printable Airsoft Gun
    piston_catch.SLDPRT165 KB
    3D Printable Airsoft Gun
    piston_head_spacer.SLDPRT138 KB
    3D Printable Airsoft Gun
    rear_sight.SLDPRT416 KB
    3D Printable Airsoft Gun
    rear_sight_fold.SLDPRT460 KB
    3D Printable Airsoft Gun
    safety_lever.SLDPRT191 KB
    3D Printable Airsoft Gun
    sear.SLDPRT383 KB
    3D Printable Airsoft Gun
    stock_base.SLDPRT988 KB
    3D Printable Airsoft Gun
    stock_butt.SLDPRT310 KB
    3D Printable Airsoft Gun
    stock_shoulder_rest.SLDPRT1 MB
    3D Printable Airsoft Gun
    trigger.SLDPRT366 KB
    3D Printable Airsoft Gun
    trigger_box_left.SLDPRT813 KB
    3D Printable Airsoft Gun
    trigger_box_right.SLDPRT738 KB
    3D Printable Airsoft Gun
    trigger_guard.SLDPRT114 KB
    3D Printable Airsoft Gun
    trigger_link.SLDPRT263 KB
    3D Printable Airsoft Gun
    trigger_release_left.SLDPRT151 KB
    3D Printable Airsoft Gun
    trigger_release_right.SLDPRT361 KB
    3D Printable Airsoft Gun
    upper_receiver_front.SLDPRT1 MB
    3D Printable Airsoft Gun
    upper_receiver_front_cap.SLDPRT285 KB
    3D Printable Airsoft Gun
    upper_receiver_left.SLDPRT495 KB
    3D Printable Airsoft Gun
    upper_receiver_right.SLDPRT518 KB
    3D Printable Airsoft Gun
    picatinny_UR_front_1.sldprt196 KB
    3D Printable Airsoft Gun
    picatinny_UR_front_2.sldprt188 KB
    3D Printable Airsoft Gun
    picatinny_UR_front_bottom_1.sldprt190 KB
    3D Printable Airsoft Gun
    picatinny_UR_front_bottom_2.sldprt184 KB
    3D Printable Airsoft Gun
    picatinny_UR_main_1.sldprt201 KB
    3D Printable Airsoft Gun
    picatinny_UR_main_2.sldprt183 KB
    3D Printable Airsoft Gun
    bipod_base.SLDPRT583 KB
    3D Printable Airsoft Gun
    bipod_foot_left.SLDPRT358 KB
    3D Printable Airsoft Gun
    bipod_foot_right.SLDPRT375 KB
    3D Printable Airsoft Gun
    bipod_pivot_left.SLDPRT317 KB
    3D Printable Airsoft Gun
    bipod_pivot_right.SLDPRT313 KB
    3D Printable Airsoft Gun
    printing files.rar2 MB

    Step 2: BOLT

    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun

    As you will have seen, the piston is actually a bike pump, simple and very cheap, it also comes pre-greased, so no need to look for some silicone grease.

    Here's the link to a similar pump I used:

    http://www.ebay.com/itm/Mini-Portable-Bike-Bicycle...

    The bike pump needs to be roughly 28mm in diameter to fit in the upper receiver. As you can see, there are two main types of bike pump- cups and o-rings. O-rings give you a better seal at high speed, so get one of them if you can.

    The cylinder head should be glued (using epoxy) into the bike pump cylinder which you'll have cut to 68mm long, then the piston head and catch should be glued to the PVC tube which you'll have cut to 72mm long. A 30mm long section of 7mmOD irrigation tube can then inserted into the front of the cylinder head. Finally, bolt the handle into the side of the cylinder head, and voila! Your bolt is complete.

    Step 3: TRIGGER BOX

    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
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    You'll need to savagely rip open a few dead pens and harvest their springs for use in the trigger box and hop unit.

    The trigger box can now be put together using those springs, parts you've printed, and a few small bolts (15mm long 3mm diameter thread, and 28mm long 4mm thread).

    If you want to know how it works, have a look at the 'Inside the 3D Printed Airsoft Gun' video, towards the end it takes a look at the trigger box assembly and mechanism.

    Step 4: MAG

    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
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    Now to assemble the mag. You'll need to scavenge a mag spring from a broken bb gun mag. I realise this is not commonly found, so in my next design the mag will use a rubber band which is much more easily available. You'll also need a few bobby pins, one of which you'll need to cut down to fit the grove near the top of the right side of the mag housing.

    The humble bobby pin is actually made from high tensile spring steel, and makes a great spring for a mag catch, or for any other mechanical parts with a relatively short range of motion.

    The function of the mag catches are to hold the mag into the mag well, which can then be pushed in, releasing the mag, by the mag release buttons on either side of the lower receiver.

    Another catch sits up the top of the mag housing beside the channel for the bb's. This bb catch holds the bb's in while the mag is being loaded. When it is pushed into the mag well, it is pushed back out of the way by the feed tube that protrudes down about 5mm, allowing the bb's to jump up into the hop unit. This accounts for the satisfying click you'll hear as the mag is pushed in.

    Unfortunately the gap between the top of the mag and the chamber means about 4 bb's fall out when the mag is removed, so the mag capacity is actually 15, but 4 don't make it into the chamber unless you tip the gun upside down as you cock it. But this is a minor problem most airsofters will have come across before. In my next design however, I will fix this issue with a more realistic loading style where the bolt carries a round up into the chamber, hence covering the vertical gap.

    Step 5: LOWER RECEIVER

    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
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    As previously mentioned, the lower receiver has two mag release buttons on the sides which are simply pushed into two holes inside the receiver. You may need to do some sanding if you can't remove the all support material inside the holes. When both are pressed, the mag is released and can be pulled out.

    The grip is fixed in a similar fashion to real guns, where a bolt is inserted through the base of the grip up into the lower receiver. The vertical slots in the grip prevent any unwanted forwards/backwards motion.

    Perhaps surprisingly, the trigger box is not actually fixed into the lower receiver. This is because when the upper receiver is bolted on top, it holds the trigger box in place. In my next design I am leaning towards an assembly with minimal fixtures and no tools required.

    Step 6: UPPER RECEIVER

    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun

    The lower receiver is now all assembled, we can begin on the upper receiver where the real action takes place! (excuse the pun)

    There are two fixtures between the upper receiver and the lower receiver, one is a hinge at the front, and the other is a bolt through the baseplate and the stock. The hinge allows the guns internals to be accessed easily, the same idea as the ICS split gear box design.

    You'll need to choose a spring now, I used an M130 second hand airsoft spring which cost me about $10 from ebay. You may need to snip your spring down to size so it isn't too pre-compressed.

    The trigger must be held down to insert the bolt, just like a real gun. After the bolt

    Step 7: STOCK

    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun

    Time to attach the stock.

    One bolt goes through the lower hole on the stock base to fix it to the lower and upper receivers.

    You'll need to cut two lengths of 15mmOD metal tube, steel, aluminium, or even copper, doesn't matter too much. They then need to be glued into the shoulder rest as seen above. If you're spray painting, do that first before you glue so you don't have to tape around awkward angles.

    One awesome thing about 3D printing: fancy cut-in design patterns actually reduce time and cost to implement, unlike conventional manufacturing processes where this would add cost and time. Less material, less time. It just makes sense!

    Step 8: HOP

    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
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    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
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    Moving onto the hop unit now. If you're not an airsofter, hop-up is backspin on the bb that allows it to travel further, the bb literally 'hops up' instead of dropping early. This unit presses a small rubber sleeve down into the barrel so that when the bb passes it, it catches slightly, giving it backspin.

    This hop unit uses a slightly angled slide pushing a ball bearing (in this case, a bb) down onto the rubber sleeve so that the amount of contact between the bb and the rubber can be finely adjusted.

    The chamber spring prevents bb's from falling back into the upper receiver when the bolt is pulled back and the nozzle comes out of the chamber, something I call 'backwash'. It was a really annoying design challenge as I wasn't willing to fix the cylinder in place and have to pull back the piston itself to cock the gun. But again the trusty bobby pin saves the day!

    Step 9: FRONT UPPER RECEIVER

    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
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    3D Printable Airsoft Gun
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    Now to assembly the front half of the receiver. You'll see a large threaded rod up top, this provides strength down the entire length of the gun, and bears the brunt of the force from the piston hitting the cylinder head, so that the plastic doesn't have to, making the gun very durable. But of course, if a part does break, just print another one! Gotta love 3D printing...

    The pictures explain how to assemble the gun, but remember to cut another section of metal pipe however long you wish your barrel to be- maybe sniper, maybe assualt, whatever look takes your fancy.

    You may be curious at this point as to the style of the gun. It is actually styled after a SCAR-H, obviously not the same, but it imitates the look and feel of the gun. Why the SCAR-H you ask? Just because I like the look!

    Step 10: FINISHING TOUCHES

    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
    3D Printable Airsoft Gun
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    3D Printable Airsoft Gun

    Finally we can add the icing on the cake, our rear sight and bipod. These are simple enough to put together once you've printed off the parts, so I'll leave you to it.

    The rails are the same dimensions as a picatinny rail, weaver will also fit. I haven't tried a scope on it yet as I don't own one, but if anyone finds it doesn't fit, let me know and I can change the files.

    Step 11: HAVE FUN.

    3D Printable Airsoft Gun

    There you have it, your own 3D printable airsoft gun. If this project is a little too big for you, stay posted for my next gun which will require less materials and tools, have more cool features and can be printed on a 120mm cubed desktop printer.

    Hope you enjoyed the Instructable, whether just for inspiration, for actually making the gun, or just for a good read. If you were wondering how I got my printing done, it was through Palmer Design and Manufacturing.

    A huge thanks to Andrew Palmer there for all his help with the printing. PDM does professional end-use parts manufacture or prototyping, there's some awesome stuff on the website, check it out right here: http://palmerdesign.co.nz/3d-printing-service/

    I welcome constructive feedback and any design advice or ideas from you guys! If you've got some solidworks skills feel free to make some changes or additions to the files to keep improving them. Designs won't be sold for licensing reasons, so they're all yours!

    Thanks for reading

    Step 12: Accessories

    Thanks to Roy-Tore Hofstad (rhofstad), the gun now comes with a foregrip and a flashlight holder! These accessories really make the gun intimidating. He also made a larger front sight to accommodate a thicker barrel.

    Thanks again to Roy for modelling those up, and make sure you print them if you are making the gun! FrontSightBeefy1.STL
    3D Printable Airsoft Gun
    FrontSightBeefy1.STL126 KB StubbyGrip.STL
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    StubbyGrip.STL287 KB FlashLightMount29to31mmDia.STL
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    FlashLightMount29to31mmDia.STL68 KB
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    StubbyGrip.SLDPRT266 KB
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    FrontSightBeefy1.SLDPRT420 KB
    3D Printable Airsoft Gun
    FlashLightMount29to31mmDia.SLDPRT223 KB
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