Fun fact: I used old firing sounds and only added action sounds on top of the exact sound it used before, but since this change received quite a lot of negative feedback, I decided to rework them to add a bit more punch to the gun. Sounds should resemble the old firing sounds a bit more. This change will be included in the upcoming 2.6 patch, but since sounds can be modified client side, you can replace the existing sounds in your:
...\Battlefield2\mods\fh2\objects_weapons_client_handheld_2.zip\Weapons\Handheld\m1garand\sounds\
Sounds are available on our Discord, you can download them
here.