so i had this little glitch where my medium and long scope is broken and i really cant figure out why

(sorry for crappy quality) in the screenshots, i had a bunch of mods loaded (around 120 or so) however it doesnt seem like one of the mods is causing that because i was able to reproduce the glitch with only the gun mod (and obsfuscate) it might be worth noting that optifine IS installed both with the 120 mods and only while i was using the gun itself and i do keep getting an open gl error that states "Open GL Error: 1282 (Invalid operation)" but i havent looked into this yet.

Minecraft: 1.12.2
Forge: 14.23.52847
Gun mod: 0.15.3
Obfuscate: 0.2.6

just curious if anyone actually had this before and im sorry if this is an already solved problem which i couldnt find, thanks in advance, much love.

OK MY BRAIN IS DOO DOO AND I JUST DID IT WITHOUT OPTIFINE AND IT WORKS AS INTENDED.
yeah seems like optifine is messsing with the scopes, sorry for not looking into this earlier and having to waste both our time reading this (hope it helps someone who has the same issue tho). ty <3