Game had weapons removed/missing guns?

[Pregnome]

So, before the game came out i went to go look at a FC4 wiki to check and see what guns are added, under the sub machine gun category (http://farcry.wikia.com/wiki/Far_Cry_4_Weapons) They have the A99 (Tec-9). I know they have a signature weapon that is the Tec9 and the same goes for the MG42, but in the pictures i've seen of the game before it came out the player is holding an mg42 that isn't modified like the signature one.

Also, I've played some custom outposts and used this one sniper rifle called the SA/something,something. I'm not seeing that anywhere in the game yet it's in the map editor. Does ubisoft plan to add this as DLC or something?

TL;DR Tec9+MG42 only Signature weapons, gun called SA50 in editor, not game.

EDIT: These are the guns i'm talking about.
Tec-9 - http://i.imgur.com/KOUBC6V.png
SA50 - http://i.imgur.com/sFgwvaJ.jpg

[Richard Siegers]

The standard a99(Tec-9) you can get in the arena battles but out of the arena i didnt see it

[O)))]

There are plenty of weapons that unlock as you progress that aren't listed in trade even with a "locked" icon over it.

[Pregnome]

Oh, I figured that they probably didn't list them, I guess I should have 100% the game before saying anything. Thanks for the replies though.

[Bongwater Pizza]

You can unlock a lot of weapons by finding them on the ground. They won't be listed in the weapon shop as something you could even own, untill you find it. As an example, the P416 wont be in the shop, but if you pick it up once, it permanently becomes available to you for free. I've probably had 6 weapons that weren't on the list, added.

[Starke]

The Tec 9, MG42, SA50 and Desert Eagle unlock when you finish Payback, the same mission that unlocks your sixth health bar.

A Key to the North unlocks a bunch, like the SPAS 12, the Kriss Vektor, the .44 magnum and (probably) the P416.