Leber V2

@S3igu2 50.1MiB Updated August 1, 2025, 9:43 PM Released March 6, 2025, 10:18 AM 0.010LBC 5 Reposts

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Odysee

Alternative links

LBRY Desktop

Leber V2

AR15 FCG (Fire Control Group) based SP5 / SP5K Lower

--------Leber V2 Description--------

The Leber V2 is a AR15 fire control group lower for the MP5 and MP5K.
It uses Steel plates for retaining the FCG with all other critical points
benefiting from the steel plates. Credit to @UberPoor on X/Odysee for the ARMP5 V1 & V2
as this was heavily based off those early designs.

For those interested in supporting future projects, donations are greatly appreciated.
Contributions can be made via Bitcoin to the following address:
bc1qz37yzsa6090alxd5zlulhm3ns38qjrmszcq2c5

--------Leber V2 Hardware Required--------

SCS Reinforced FCG Plates
- 1x Leber V2 SCS Plate P1
- 1x Leber V2 SCS Plate P2

SCS Plate Hardware
- 1x M5x20 Socket Head Screw
- 1x M5 Nut
- 1x Flat-Tip Set Screw 18-8, M5 x 0.8 mm, 12 mm https://www.mcmaster.com/92605A235/

Ejector Hardware
- 1x 6MM ID, 6MM OD, 4MM Long Sleeve https://www.mcmaster.com/92871A006/
- 1x German HK Ejector with hammer CUT (Must be German made)
- 1x HK Ejector Spring

--------Non Leber Specific Hardware Required--------

Fire Control Group Parts
- 1x AR15 Hammer
- 1x AR15 Heavy Hammer Spring
- 1x AR15 Trigger
- 1x AR15 Trigger Spring
- 1x AR15 Disconnector
- 1x AR15 Disconnector Spring
- 2x AR15 Trigger and hammer pins
- 1x AR15 Selector
- 1x AR15 Selector Detent
- 1x AR15 Selector Detent Spring

-------Print Settings-------

Everything is designed to work in PLA Pro or Polymaker PA6-CF
if you want a more high temp option, see my odysee guide
@s3igu2 for exact settings if you plan to print in polymakers pa6-CF.

STL files are orientated correctly and have brims / supports where needed
(STEP files are NOT orientated correctly)

Temp: 220/60C (PLA PRO)
Nozzle: 0.4mm

First Layer Height - 0.20
Layer Height - 0.15

Wall Loops - 8 Walls Max
Infill - 100% Rectilinear