KC-02 "MK3 CQC / DRS" Bullpup Stock addon by 0235

Modifications / accessories for the 3D printed Bullpup "https://cults3d.com/en/3d-model/gadget/kc-02-bullpup-35-stock-by-0235". You will also need to purchase this, as it has some base files. These extra pieces are just a modification of this file. Please read the page for the original, as it will have some additional information.

You will need some hardware like M3 dome head bolts, M4 socket head bolts, a couple of springs, and some 2.5mm metal rod.

Please also see the PDF files for bill of materials, assembly drawing, recommendation, and licence. There is also an assembly video for the extra pieces: https://youtu.be/rsaXEI3q_BI

Compatible with the Tanukiworks HPA adapter,and with the Rogueworx Hop up kit

Below is the BOM for completely assembling the CQC / DRS bullpup.

QTY Type Dims Name Extra info NOTES

2 Accessory N/A KC-02 20mm rail part of default ASG STC
6 Bolt N/A KC-02 20mm rail bolts part of default ASG STC
1 Bolt N/A KC-02 pistol grip bolt part of default ASG STC
1 Washer N/A KC-02 pistol grip washer part of default ASG STC
1 Nut N/A KC-02 pistol grip nut part of default ASG STC

3 rod 2.5mm x16mm for front guide & stock pins metal rod needs to be cut to length
1 rod 2.5mm x17mm for trigger metal rod needs to be cut to length
2 rod 2.5mm x3.5mm for centre guide metal rod needs to be cut to length
2 rod 2.5mm x6mm for rear guides metal rod needs to be cut to length

25 Bolt M3 x 8 M3x8 dome bolt "Socket head button screw" 6 of these are just for looks, so bare minimum is 19
2 Bolt M3 x 16 M3x16 dome bolt "Socket head button screw"
6 Bolt M3 x 20 M3x20 dome bolt "Socket head button screw" Only 2 needed for CQC Upper
4 Bolt M3 x 30 M3x30 dome bolt "Socket head button screw"
2 Nut M3 M3 nut NOT a Nyloc not used for CQC Upper

3 Bolt M4 x 30 M4x30 socket bolt "Socket head"
1 Bolt M4 x 35 M4x35 socket bolt "Socket head"
4 Nut M4 M4 nut NOT a Nyloc

1 Grub Screw M5 x 8 M5 Grub Screw

1 Accessory 6mm 6mm plastic BB you should have one of these!
1 Spring 4x8mm 4mm diameter, 8mm long compression spring
2 Spring 5.3x17mm 5.3mm diameter, 17mm long compression spring
OR OR Nylon OR Nylon
3 spring N/A Clicky pen spring CUT TO ABOVE DIM LENGTH

THE MORE WALLS, THE STRONGER!

Most of the large parts were 5 walls, and the smaller parts were 4. In Cura I used the "cubic subdivision" as this gives quite high infill density near the skin, but hollower near the middle.

Most of the files are the "correct way up" for printing, though always make sure to "lay flat on bed" as some of these were difficult to position the right way up when exporting them. This means some of the pieces will need support, though as much effort has been taken to reduce "touching all surfaces" supports.