M24 rifle model for Astra Attack

Based on "sniper animated" by DJMaesen (bumstrum).
Source: https://sketchfab.com/3d-models/sniper-animated-b48999a250b2433da59f705c371a49b2
License: Creative Commons Attribution 4.0 International (CC BY 4.0)
https://creativecommons.org/licenses/by/4.0/

Modified for Astra Attack: extracted rifle and integrated scope, removed arms,
cartridge and suppressor, calibrated metre coordinates, merged static and bolt
meshes, converted PBR texture channels, resized textures to 1K and encoded WebP,
replaced the missing reticle texture with a dark lens material, and adapted
hand poses and bolt/magazine animation. No endorsement by the author is implied.

The source title does not identify an exact real-world firearm. M24 is the
in-game name for this M24-style asset. Existing game balance is independent of
the model. Hand/arm animation credits (EXUnum) remain in the game credits.