SKS AEG/HPA full build kit

The first ever airsoft SKS at your service!

Realistic operation, stripper clips, and more!

LOADS AND UNLOADS LIKE THE REAL THING!

ASSEMBLY VIDEO

https://www.youtube.com/watch?v=X37QJxmNTJo

The whole kit is built around a cyma M14 gearbox and a cyma M14 hop-up chamber. The slim profile of said hop up chamber gave me an idea, so I designed a top-loading replica with an internal magazine!

The replica is "set" to semi-auto only, but show there be any need (like the gearbox getting "stuck"), you can temporarily set it to full auto by taking off the top cover and nudge the white selector rod forward with a flathead screwdriver of an allen key.

The magazine has a BB router, that will allow loading through a side channel, but won't allow BBs to go out anywhere but towards the hop-up. There is not traditional BB retainer inside the mag, so when you pivot the mag down, it will "unload" like the real thing. This will mean BBs flying out depending how much you have inside.

The internal mag uses an AEG midcap spring (I used a Cyma AK mag spring and cut it a little bit) and a special BB follower.

I designed a stripper clip imitation.

You can use an M-lok sling mount (with longer bolts) in the stock, I attached a picture, it's a cheap piece, I bought it off AliExpress.

You can attach an AK type side mount (THE SHORT TYPE!!). There are 3 small dots on the left side of the stock, you should drill those through. On the inside, there are hex cuts for the nuts.

Take the time and glue every hexnut (that is sitting in a hexagon shaped hole) in to make your life easier in the long run.

Now the stripper clip is of course VERY cool but it can only load 15 BBs which of course doesn't really allow competitive gameplay. Furthermore it's actually quite difficult to make the stripper clip work because it's somewhat fragile and all the spring pressures need to be juuust fine inside the mag. Worry not though, you can also load BBs with a traditional pistol mag-type speedloader!

Alternatively, you can use AK mags through an adapter (please use 7.62 curve AK mags though):

https://cults3d.emulatorsite.com/en/3d-model/game/ak-mag-adapter-for-fnv-sks

It will basically convert the replica into a chinese type 63!

Bayonet:

https://cults3d.emulatorsite.com/en/3d-model/game/bayonet-for-fnv-sks

Thread adapter:

https://cults3d.emulatorsite.com/en/3d-model/game/thread-adapter-for-fnv-sks-fnvworkshop-2

Rail mounts:

https://cults3d.emulatorsite.com/en/3d-model/game/rail-mounts-for-fnv-sks

Standard components

M14 original pattern gearbox (Cyma will work just fine)
M14 hop-up chamber (full) (Cyma will work just fine)
400 mm AEG inner barrel
AK rear sight (with its leaf spring)

Bolts
1 pc M2.5x14-15mm knurled flathead bolt
3 pcs M3x30mm sunkenhead bolt (trigger guard-gearbox connection, stock B and C connection)
2 pc M4x6mm point head grub screw (barrel connection)
5 pcs M4x6mm ball head grub screw (takedown lever retainer, bolt retainer, clip retainer, BBretainers in the stripper clip and the internal magazine)
2 pc M4x8-12 point end grub screw (magazine release travel limiter, stripper clip-bullets imitation connection)
2 pcs M4x25mm grub screw (stripper clip-bullets imitation connection)
1 pc M4x20-25mm socket head bolt (upper handguard-rear sight base connection)
1 pc M4x35mm socket head bolt (lower handguard-rear sight base connection)
2 pcs M4x12-15mm slotted head cap bolt (lower handguard-forend connection)
2 pcs M4x20mm sunkenhead bolt (internal magazine)
1 pc M4x30mm sunkenhead bolt (internal magazine)
1 pc M5x75-90mm socket head bolt (full thread!!!) (spring guide)
2 pcs M5x12-16mm slotted mushroom head bolt (stock pad)
5 pcs M5x30mm sunkenhead bolt (stock A, B, C and D connection)
1 pc M5x110mm (or longer) socket head bolt (forend-gas tube reinforcement)
1 pc M6x40mm splint nut-bolt stock-rearsight-magazine axis
1 pc M6x14mm barrel nut with a modified M6 grub (front sight)
1 pc M2.5 hexnut
7 pcs M4 hexnut
9 pcs M5 hexnut
1 pc M4x230-260 threaded rod with 2 M4 hexnut (cleaning rod imitation/outer barrel reinforcement (optional)

Springs
1 pc compression spring 50 mm long 12 mm OD (hopup chamber tensioner)
1 pc compression spring about 150 mm long 8mm OD (I recommend 0.7 mm wire) (main spring, I recommend getting a 300-305mm long one and then cut it to size)
2 pc compression spring 25-30 mm long 4.5-5 mm OD (You can find such springs in ballpoint pens)

Some of these components are hard to find, me and I'll send you every standard component that is needed (for a small fee).

The stock is assembled from 4 pieces to allow printing on normal size printers. I designed the stock pieces with wood-filled PLA in mind, so walls are thick, about 6mm in most places. You can of course use plain old PLA or anything else , then sand and paint it until it kinda look like wood.

HOW TO MAKE THE STOCK LOOK LIKE THIS

Use wood filler on the ts, then tighten all the bolts keeping the parts together. Sand it with 50-80 grit sandpaper, then with 100-120 grit sandpaper. Paint it with wood paint. Use an old brush so that you can add some lines as you work, to imitate the texture of real wood. You may choose the exact color depending on what model of sks you want. The one on the pictures is walnut (there is no need to use walnut color wood-PLA, standard birch color is fine). Wait one day. Sand again with 120-150 grit than paint another layer. Wait another day. Sand with 180 grit and apply laquer. Shellac was used on the real steel, I also used that. Buy a solved one. No need to dilute, just bring it on. Wait one day. sand with 180 grit or above, and apply a second layer of laquer or shellac. Wait at least one day then wipe it with a clean cloth. Two layers of paint should be enough on the outside, followed by two layers of shellac. You may add more layers of laquer or shellac if you deem necessary of course.