7.62x39mm replica and snap cap

7.62x39mm, also known as 7.62 Soviet or 7.62 AK, is a centerfire rifle cartridge designed in Russia by a group led by N.M. Elizarov in 1943.

Print this for props, display, education, training, just because it's cool, or scale it up to become a container.

Contains 5 files:

- Accurately sized replica: 7.62x39_cartridge.stl

- Separate bullet and case pieces for easily printing in different colors: 7.62x39_bullet.stl and 7.62x39_case.stl

- Snap cap/dummy round for cycle and dry fire practice, with firing pin hole and reduced bullet size: 7.62x39_snapcap.stl

- Information txt file with recommended print settings: 7.62x39_info.txt

Originally uploaded on Thingiverse: https://www.thingiverse.com/thing:6078839 

Print Settings:

- Material: Tested with PLA and PLA+/PLA Pro.

- Overall print size: 55.88mm tall, 11.35mm diameter.

- Layer Height/Quality: 0.16mm or less recommended, 0.12mm works best.

- Infill: 20% is fine for display, 60% or more recommended for snap cap use.

- Print Speed: 50mm/s or less recommended. I do 40mm/s for cartridge, snap cap, and case piece; then 30mm/s for bullet piece. I also do 10mm/s initial layer speed.

- Adhesion: A brim might be needed, depending on the printer and bed type. I have a textured PEI bed, and with proper calibration, additional adhesion isn't needed.

- Post print: The pieces may require some sanding or filing for proper fitment if the bottom layers bulged out a little. Fitment should be a little snug, but easy to take in and out. A properly calibrated setup shouldn't need additional work.