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HOW to make a magazine cut-off

9795 Views 57 Replies 11 Participants Last post by  Chow
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Air gun Wood Trigger Gun barrel Machine gun


its working!


Trying to get back into airsoft, took a 5 year break. Like the title says, I have an idea for an AEG AK build with functioning charging bolt, mag empty, magazine out function. Think KWA AKR ERG. The reason i didnt go that route is that:
i like the ak 74u platform, very compact. akr is proprietary. i like real wood and stamped steel. i like to tinker/fabricate stuff. use of my own EFC/MOSFET for trigger response, not so much ROF. So far i have preordered a CM045A* coming in next month. Gate Warfet1.1 EFC with control board. 3AH 20A lion battery cells. Magnetic reed switches and 6mm neodymium magnets for switch activators.

I plan to glue magnets to the magazine and follower, then glue the reed switches to the gun itself so it will disconnect the trigger when the mag is either out, or empty/low BB's. someone on youtube has a similar setup which i borrowed the idea from.

Im custom making a 16v L-ION 3ah battery pack with LG HG2 cells which the warfet1.1 should handle fine. My aim is for realistic gun manipulation and trigger response. the gate warfet 1.1 has a pretty cool precocking feature which should lower FPS in the long run (keeps spring compressed) and create a hair trigger without the fuss of a dsg build. scratch this- you dont need precocking with a 16v battery :p

*Some questions im hoping you guys can help me out with is the function of the bolt charging feature once a new magazine is inserted. Im not sure if I need a relay or if this can easily be done mechanically.

Ill keep this build updated with pictures when the gun itself comes in. If you see any things i overlooked please critique my ideas.

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Yeah that’s what I meant, like in the pistol grip part.
Yeah that's what I meant, like in the pistol grip part.
I did some quick math last night on meshmixer. it would look super bulky if i were to place a compartment in the 'hull'. i would need to fashion a custom grip to house a 9v. for sure will be more blocky than what i have now. that means it would look like a glock grip lol. ak74su glock edition

Looks like the SRU one.
Almost. i mean, one can only make so many designs for a glock conversion without adding unnecessary/stupid stuff lol. sure beats paying sru hundreds vs printing this overnight for < $10

Although SRU has some great designs and finish. it just sucks tremendously that they use PLA plastic that will deform if their kits are left in a hot car.
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This is plain awesome! I own a 3d printer and use it for prototyping. What material do you use for airsoft stuff? I've been using pla for the prototyping and petg for the final product.
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This is plain awesome! I own a 3d printer and use it for prototyping. What material do you use for airsoft stuff? I've been using pla for the prototyping and petg for the final product.
ABS or PET G. yeah, 3d printers are now a necessity for me. I literally think of crap, and pump it out over the weekend. the future is now lol
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quick update. I was thinking about the 9v battery not fitting in the foregrip because my 16v Lion takes up most of the space on the top, and below the barrel is pretty much too narrow to fit anything wider/taller than 15mm.

Then i figured if its a 9v lipo, there has to be 2 slim cells inside!

viola! take apart the 9v and de-solder the plug. I'll just recharge using my b6 and micro connectors. :)

PS: its the little orange thing in the front guard. under the lion stick.

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with the real estate under the barrel, i could also run momentary buttons for either a 100lumen navi light or a red laser. of course all built into the 3d hera grip.
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couple more updates. i have since painted the front grip, and finished wiring the secondary lipo for the momentary Hop Unit tracer. tracer switch works like a charm.

The grip however looked Great as it matched the color of the wood/fakelite magazine. The down side was the matte clear coat i used made everything pale LOL. i even sanded down the color to bring some black through like someone suggested.

on a batter note, Im printing a prototype Magpul Grip for the ares slim motor. heres a teaser:

(for a more vertical grip, the motor profile comes VERY close to the edge. i maaay have some wiring issues)
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Gotta be real careful with the grip wires. I shorted my AK last week when I swapped from my RK-3 grip back to the stock AKM grip and exposed the barest sliver of wire. Luckily the gaps were small enough to just be covered up with some shrink wrap, instead of requiring a rewire.
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Gotta be real careful with the grip wires. I shorted my AK last week when I swapped from my RK-3 grip back to the stock AKM grip and exposed the barest sliver of wire. Luckily the gaps were small enough to just be covered up with some shrink wrap, instead of requiring a rewire.
Thanks!

Turns out the wires are fine. The grip fit first print! Very happy how it turned out. I finally got a magpul moe k2 grip on an ak AEG! Just had to make it myself

Air gun Trigger Wood Gun barrel Gas

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Thanks!

Turns out the wires are fine. The grip fit first print! Very happy how it turned out. I finally got a magpul k grip on an ak AEG! Just had to make it myself

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View attachment 155569
If that last pic is the current paint job, I gotta say I'm legit impressed. Well done.
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If that last pic is the current paint job, I gotta say I'm legit impressed. Well done.
Thank you sir, finished it this afternoon. Had to repaint the brown, and used a light coat of gloss clear.
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cleaned up the battery bay. Also better lighting. then to top it off, a snubby flash hider. (notice how the battery cells match the furniture.. had that planned all along lol)

Machine gun Air gun Trigger Wood Gun barrel


Air gun Trigger Machine gun Wood Shotgun


And another one showing the MLOK rail bits i printed. will be painted black

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That would look really nice with the stock pulled off it. I'd hate to use it without a stock, but it would certainly look good.
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how she stand now. sanded off the stock reddish varnish, and went back with 4coats of oil stain. some nice looking wood grain behind a stock CYMA 045a!

also dont mind the TM MWS

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This is epic!! Makin’ me consider getting into AEGs.. I wanna see those APS slugs!
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as she stands now. i burned the hadguards, painted the k2 grip, and changed the warfet to semi and 3 round burst.

Air gun Wood Trigger Gun barrel Machine gun

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Looks great!
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