OTs-14 Groza kit E&L (Tokyo Marui, APS?) HPA version

Please make sure you buy the correct version! This is for E&L AKS-74U/UN AEG builds. To my knowledge it should be compatible with Tokyo marui and APS as well. Contact me and we can confirm compatibility or I can adjust the design if something is not compatible.

A Groza conversion kit with a user-friendly assembly.

HPA version has a lot smaller "bump" on the stock, because it does not house the motor cage.

No need to make any irreversible modifications. You may return to the original state anytime.

No need to drill/cut the gearbox. The trigger should be replaced by a new gearboxtrigger compatible with the bullpup trigger mechanism.

No need to rewire the trigger, thus the original fire selector remains usable. The front trigger is mounted onto the forend by an M5x35mm knurled pin/grub screw (or a buttonhead bolt in the worst case scenario). It's connected to the gearbox trigger by an aproximately 33 cm/13 inch steel rod (I recommend 2mm diameter spring steel, you may also use bycicle wheel rods) with a square bend on both ends. Said rod should be fixed by an M4 buttonhead bolt (max 20 mm long) to the left of the forend.
The forend has a universal grip attaching surface, you may use a number of pistol grips, AEG or GBB spec. AEG spec grips will need an aproximately 95 mm or longer M4 bolt and nut, GBB spec grips will need an M6x100 mm or longer bolt and nut. The pictures show a WE made GBB spec grip.

No need to replace the gas block. The carryhandle attaches to the front sight flaps (slide it in from the back) and also replaces the gas tube in order to be kept it place by the pin that usually fixes the gas tube. I know the gas tube is steel and it's a strange idea to replace it for a 3D printed plastic part but this is the only way I could make it strong. This way the carry handle is STRONG ENOUGH TO BE USED AS AN ACTUAL CARRY HANDLE. You should use the original front sight spike in the carry handle. You may rotate the upper handguard out of the original gas tube and rotate it in the same way in the carry handle-gas tube assembly.

The foregrip is barrel centering, you may use up to 310 mm long inner barrels. It also has a built in sound amplifier, that will only work with original length (260 mm inner barrels). It has the correct M24x1.5mm thread included in the file.

The stock keeps the trigger guard in position. I would recommend using the original trigger guard as a sling swivel. But you may also cut it off for a more realistic look.

I included a backpad, you may attach it with two M5x30mm (or slightly longer) sunkenhead bolts and nuts. I recommend printing it in a rubber like material. Not shown on the pictures.

I included a magazine. It cannibalizes a cyma mid cap mag for the small parts and springs. You need one of the two long springs, the BB follower, the BB stopper, and the BBstopper spring. I included the stl files for these small pieces too, in case you need them. The mag is two piece, connected by 3 M4x25mm bolts and nuts. Each mag should be finished by 6 small magcover "dimples" to cover the bolts. The magazine has a capacity of approximately 50 rounds.

Update: I added another type of magazine (ver2) which uses the front "flap" of Cyma steel AK mags as well the longer top pin to mount it. This way you may use 3d printing materials of lower mechanical qualities/lower infill on the magazines.

I included two optical picatinny rails, a shorter lower profile and a longer higher profile. The high profile is fixed by 2 M5x30mm bolts and nuts, the lower is fixed by 2 M5x20mm bolts and nuts.

Suppressor is a separate piece:
https://cults3d.com/en/3d-model/game/ots-14-groza-suppressor

Pictures show the Cyma version, "makes" are welcome!

AEG version:
https://cults3d.com/en/3d-model/game/ots-14-groza-kit-e-l-tokyo-marui-aps-aeg-version