[M1A Garand] .30-06 x8
Yes it pings only when fed through the en-bloc clip and not tacobell clip
Optionally can craft it with a flashlight, batteries and elastin to give it the capability to see in the dark.
Shoots in either in en-bloc clip or a taco bell container to hold 8 rounds.
The difference in ammo magazine is due to skill requirements to craft en-bloc is via weapons with steel, taco bell container is by a mechanic with plastic.

[M1A Garand Tanker] (same thing as above)
But this weapon is crafted with carbon to simulate carbon fiber and it is 7 inches smaller than the one above. Shoots with a little more recoil and is a little inaccurate due to its length.

[Mosin Nagant 1891] 7.62x54mm x5
Same thing as above in terms of crafting, but more melee variants
Can be water proofed from Europa water with elastin but this plugs the barrel and removes its capabilities to shoot.
Instead of tacobell clip the container for the mechanic crafted plastic clip is from mcdonald's french fries. Stripper clip is the alternative in steel.

[H&K P11] flechette x5
A 5 barrel flechette dart shooter enclosed within an electrically charged handle, when you craft it, you need batteries. When shot in the air, it has reduced range from being a flechette round but does similar damage as water.
No further attachments but due to it being a pistol you can hold two or hide these due to its size. Technically you cannot reload the barrel (which holds 5 shots) without a factory remaking the entire gun, but there was a russian styled pistol of the same type that could reload 4 shots, since this is a video game, I balanced out the Russian underwater armory in favour of HK cause it looks cooler with a reload-able barrel.

[QBS 06] 5.8x42mm flechette x26
It's basically an APS, full auto Russian styled AK that shoots underwater really fast and requires water to function well.
Its magazine holds 26 rounds of flechette at 600RPM.
Has optional flashlight attachment as well. These should not be shot above water unless it's an emergency.

[Seaway Aqua Craft Bangstick 1970] .50 cal x1
It's basically a melee self defense stick developed in the 1970s by a company trying to sell to the US Navy. It comes in many varieties of calibers today which is why I chose to have a .50 cal cartridge. A bangstick is a stick that you hold infront of an enemy and discharges a 50 cal cartridge of propellant like no country for oldman with that oxygen tank, very capable of self defense in and out of water, and the damage if in range, will be massive enough to stun a predator/prey for 10 whole seconds. It comes with one shot, can be reloaded. But the range is very, very short and hitting human sized target will mean a mistake will cost you your life.

[Seaway Ammo Pouch] 6 slots of small items or .50 cal ammo
It's an actual attachment meant for the Seaway Bangstick, but now it can hold most small items and all the ammunition containers within this mod package and all small sized items in vanilla game and other mods. Does less damage in melee than a toolbox. Should not be fireproof or waterproof.

This is before I added more guns. I'll write them all here someday. But it's better for you to go in game and shoot a few guns to find out.