This sound effect can be found on Dynamic Range Sound Effects Library - CDs 1 & 2, which was made by Sound Ideas. It's identical to GUN FOLEY / HANDLING - CHAMBERING .223 COLT AR15 - SEMI-AUTOMATIC RIFLE, which can be found on Dynamic Range Sound Effects Library - CDs 1 & 2.
Links:
https://soundeffects.fandom.com/wiki/Sound_Ideas,_GUN_FOLEY_/_HANDLING_-_.223_COLT_AR-15_ASSAULT_RIFLE_CHAMBERING#Audio_Samples
