Disclaimer: the Author assumes no responsibility or liability for any misuse and damage caused by the contents of this publication. The model and individual parts contained in this publication are not intended to be used to perpetrate any illegal activity.
Under no circumstances shall the Author of this model and publication be liable for any alterations made to the contents of this publication by any party aimed to construct a firearm. The tool shown in this video is a 3D printed, non-functional toy pistol with no ability to propel any projectiles in it's initial configuration by default, by design.

About:
The PP9 is a toy handgun mockup, consisting a total of 30 parts (assembly required, not including springs). Everything you expect from a pistol is completely functional: chambering, ejection, trigger pull, slide stop on ammo runout, etc.. There is no striker and trigger lever intended in this design, thus the trigger pull is for show only.
Note: PP9 stands for Printed Pistol 9 millimetre

The magazine holds up to 13-15 rounds (9mm nominal) with an appropriate steel spring (or up to 4 rounds with the included printed spring). Slide racking, extractor, magazine lever and trigger pull require appropriate springs (not included in the assembly).
Note: printed dimensions may differ, therefore some sanding may be required to achieve proper tolerance.
Note: some parts required for full functionality (recoil spring, magazine spring, magazine catch spring, extractor spring) are not included in the assembly.

Also, If you found this model to your liking and wish to support the author you can donate here

Accessories:
This model features a short-barreled rifle (SBR) conversion kit, with a few of it's own accesories, such as a semi-adjustable stock, a vertical grip, non-flip iron sights and is capable of carrying any other accessory that can be attached to a standard picatinny rail.
Note: the kit is currently undergoing testing (and as is, a semi-final prototype)

To download the kit follow the link: SP PP9 - SBR Conversion Kit
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Recommendations:
For the most appealing receiver appearance a carbon fibre/matte filament is recommended: PLA-CF/PETG-CF. Pins and levers are best made of carbon steel.
For the slide/magazine a matte/metal finish filament is recommended (ex.: Bambu Lab PLA Metal, Bambu Lap Charcoal Matte PLA).
Note: PLA is sufficient enough to withstand wear and tear. For extreme durability, printing critical parts (i.e. slide locking block, slide stop lever, etc.) with PC is highly recommended. Machined stainless steel (304L, 316L)/carbon steel (1040, 1045) alternatives are superb.
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Receiver Assembly Steps:

1. Insert the ‘Slide Stop Lever’ (2) into the slot, aligned with a thru hole on the 'Control Unit Housing' (3), and push the ‘Slide Stop Lever Pin’ (1) until flush with the housing, locking the lever in place.
2. Insert the ‘Trigger Pin’ (6) into the 'Trigger' (13) until the pin protrudes (approximately) symmetrically from the trigger on both sides
3. Attach the trigger spring (not depicted in the drawing) to the trigger, and insert it into the housing unit until the trigger pin is confronted with two legs on each side
4. Align the housing unit with the receiver and push it into the receiver, aligning the rear, the front and the trigger with their respective cutouts.
5. Insert the 'Rear Mounting Rails' (5) into the housing unit as shown until fully seated
6. Insert the ‘Ejector’ (4) into the housing unit on top of the rear mounting reals, as shown, until fully seated
7. Lock the rear side of the housing unit in place by inserting the ‘Rear Mounting Pin’ through the receiver
8. Insert the ‘Magazine Catch Lever’ into the receiver, aligning the spring cutout on the lever with the hole inside the magazine well
9. Insert a magazine catch spring (1.6-1.8mm Music Wire, 20mm Length/Glock magazine catch spring, cut to 20mm length) into the hole and push it into the sot on the magazine catch lever
10. Insert the ‘Front Mounting Rails’ (12) into the cutout at the front of the receiver, locking it in place by inserting two ‘Front Mounting Pin’s from each side of the receiver, until flush with the frame
11. Insert the ‘Slide Locking Block’ (14) into the control unit housing slightly behind the front mountil rails, until flush with the top surface of the receiver
12. Push the ‘Slide Locking Lever’ (10) until the flat section of the lever is coincident with the right sight of the receiver. Do not push it all the way through.
Note: The extractor spring is easily obtained from a lighter (the longer spring) with no length adjustments
13. Insert the magazine catch lever spring into the slot inside the receiver between two curves surfaces such that it latches onto a cutout in the magazine catch lever
Note: An alternative assembly is described down below

Alternative Magazine Catch Lever Assembly Steps:

1. Insert the ‘Magazine Catch Lever’ (2) into the receiver such that the lever is in it's default position (i.e. left side is flush with the grip)
2. Slide the ‘Catch Lever Spring Carrier’ (1) from the top of the receiver into the slot and push thru until flush with the catch lever
3. Slide the ‘Catch Lever Spring’ (3) into the catch lever, aligning it with the square guide extrusion
4. Compress the spring until it is properly seated on the guide extrusion on the carrier
Note: Slight preload is applied when the spring is fully and properly seated. See “Spring Specifications” for spring dimensions.
The spring is easily obtained from a lighter (fork spring (if with a spark wheel) or igniter spring (if with a push-button igniter))


Recoil Group Assembly Steps:

1. Slide the ‘Recoil Spring Spacer’ (2) down the ‘Recoil Guide Rod’ (1) all the way down
2. Slide the ‘Recoil Spring’ (4) all the way down, until flush with the spring spacer
3. Compress the spring slightly and attach both ‘Recoil Spring Clamps’ from boths sides of the guide rod until the ends are coincident
Note: The recoil spring is to be bought within the listed specifications or tested at the spot with a fitting off-the-self spring

Slide Assembly Steps:

1. Insert a spring into the rear circular slot in the slide and push the ‘Slide End Cap' (6) up into the slide until fully seated.
Note: The slide end cap is not intendet to be disassembled. The spring should be stiff enough to apply sufficient amount of pressure to hold the cap in place.
2. Insert the ‘Sights Contrasts’ (5) into the 'Front Sights' (1) and ‘Rear Sights’ (4) until flush with the surface.
Note: It is highly recommended to print the contrast inserts with glow in the dark or stark white filament
3. Insert the extractor spring (not depicted in the drawing) into the appropriate slot on the left side of the slide.
4. Insert the ‘Extractor’ (3) into the slot and lock it in place with the ‘Extractor Pin’ (2) by inserting it through the upper thru hole on the left side of the lost, until the pin is flush with the hole.
5. Tilt the barrel (approximately) 30 degrees, aligning the sides parallel to the slide sides and push it through until you are able to tilt it back flush with the slide.
6. Insert the ‘Recoil Group Assembly’ (8) end cap (solid front end) into the lower hole and push the guide rod thru until the rod can be aligned with a slot in the barrel, then release.
Note: The extractor spring is easily obtained from a lighter (the smaller spring) with minial length adjustments

Clip/Magazine Assembly Steps:

1. Slide the ‘Follower’ (3) into the magazine (1) from the bottom
2. Insert the included spring (5, not depicted in the drawing) or an appropriate magazine spring
3. Insert 'Magazine Bottom Plate Retainer' (4) and compress the spring by pressing it down into the well
4. Slide the ‘Magazine Bottom Plate’ (2) onto the magazine until flush on all sides and retainer plate is engaged. The spring will apply pressure to hold the plate in place.
Note: The recoil spring is to be bought within the listed specifications or tested at the spot with a fitting off-the-self spring

Complete Assembly:

1. Place the slide up on the frame top surface aligned with the front mounting rails, with the slide locking block flush with the frame pull the slide to the rear until it is fully seated in the receiver.
2. Push the slide locking lever forward until it is flush with the receiver and rotate clockwise until it is parallel with the cutout.
3. Insert the magazine into the magazine well on the receiver and push up until the magazine catch lever engages the magazine and locks it in place.