This is a new, fully functional, fully internal Glock G19 model, incapable of firing

Download the competition version here: https://makerworld.com/en/models/1120178-glock-19-articulated-new-competition-model#profileId-1118396

Regarding Printing Issues

I utilize an A1 model. Therefore, my print profiles are A1-centric, and the arrangement is tailored for individual part printing. Other models are incompatible with the A1's per-part print settings. The A1 model uses per-part printing directly. Other models default to layer-by-layer printing; for individual problematic parts, please print them separately!

Should you encounter suboptimal print quality, adhesion issues, or excessively large tolerances, please replace and dry your filament before printing.

When printing intricate models, especially toys, prepare for post-processing; model seams may protrude, resulting in tolerance discrepancies!

While relatively simple with fewer parts, making this model suitable for beginners, it still demands a degree of dexterity and problem-solving aptitude!

This model faithfully recreates the locking block mechanism.

Realistic ejection functionality

Faithful trigger safety reproduction

This model is ideal for leisurely disassembly and simulated training at home.

The main body can be printed at 0.2mm. Others at 0.16mm. Adjust the layer height and infill to modify strength as needed. I have adjusted the layer height and infill on some components to enhance durability.

The model is pre-arranged for immediate printing. Adjustments can be made according to your specific needs.

Required springs are as follows

Length 7mm, diameter 2.5mm, wire diameter 0.25mm

Length 20mm, diameter 4mm, wire diameter 0.4mm

Length 40mm, diameter 6.5mm, wire diameter 0.5mm

Length 4mm, diameter 3mm, wire diameter 0.3mm

Length 85mm, diameter 8.5mm, wire diameter 0.7mm

Length 25mm, diameter 5mm, wire diameter 0.5mm (extension spring)

If 0.5mm wire diameter is unavailable, use whole number equivalents.

Regarding springs, don't be overly concerned; similar dimensions are generally interchangeable. If truly unavailable, don't stress over exact specifications; a functional equivalent suffices! The simplest approach is to purchase commercially available springs of standard length, for instance, if I require a 25mm long, 5.5mm diameter, 0.55mm wire diameter spring, I can buy a 300mm long, 5mm diameter, 0.5mm wire diameter spring and cut it to size as needed. This is quite straightforward.

Many have commented on spring availability. I've identified some suitable springs from Bambu Lab for everyone! However, the length and wire diameters might not be perfectly identical, but they should work. Some may require minor shortening!

Thank you@nehpyh for finding such a detailed explanation:http://apexgunsmithing.com/disassembly-guide-glocks/

Video tutorial https://b23.tv/p5zhd36 Search for G19 assembly on YouTube for similar videos