damn, this looks like an Airsoft I own

maybe there's been a miscommunication from both our sides, i interpreted your comment as very passive-agressive, especially with "if you bother putting any amount of effort", as if i hadn't tried that already.
there's only so much you can do when dealing with such technical constraints.
you can keep throwing in bunch of stuff to it to try to improve it but it'll be nowhere near on par with 44100hz quality. the jump from 22050hz to 44100hz is half, that's half of data loss, which is kind of a big deal.

Your attitude has nothing to do with basic human decency, and to think anyone would respond to that in a receptive way would indicate that you aren't normal.

sounds have nothing to do with attitude

Not with that attitude

you can make 22050hz gunfire sound on par with 44100hz if you bother putting any amount of effort with EQ and filters, my mp5 from cinematic weapon sounds for example

Damn, that's such a shame. The MP5k sounded like a fucking beast in ME and I fucking loved it. Hopefully the L4D2 team will address this!

from what i know it can be fixed but it involves rebuilding the sound cache which is really inconvenient but even then it's not guaranteed that it'll work properly

to make a long story short, l4d2 uses a sound cache system, and to have custom sounds you have to make sure that the sound has the same length, same sampling rate and the same amount of channels as the original sound, not doing this will cause the sound to not play properly.
as written in the desc, the mp5 firing sound happens to have sampling rate of 22050hz which is horrible compared to most of the other sounds which are 44100hz

Too bad it sounds weak compared to the other guns. Is there a cap on the quality of the firing sound for the MP5 specifically or something? idk how that stuff works

umarex mp5 bb gun

Models nice but the gunshots sound like Krakatoa

now this is something i didnt expect. Pretty awesome mod man!

what seems to be the problem exactly

this mp5 is new version on left4dead2

hey man can help me dude

these some dope weapons you have let me try

i think i accidently deleted a comment here, sorry to whoever got their comment deleted