The Expedition

Congratulations. You have been selected to be a member of an exploratory expedition to a hidden wonderland high in the mountains of Continent X, hidden by a dense canopy of forest. The way in is so perilous that you can only make it in on foot, carrying your absolute necessities for travel. You will be resupplied by air drop when you find an opening, supposed to be in a high valley. Previous expeditions have all disappeared without a trace. You do not know anything of the people or animals who may be waiting for you.

Question: You are allowed a single long gun and a sidearm. A gunsmith hired by the backers of the expedition will put together anything you want, NFA, Class 3, you name it. What would you take up the mountain with you, understanding that they will drop whatever else you might need when you get to the top...whenever that is?

I'll start:
Rifle: In the style of the AK 102 carbine, based on a Saiga receiver in .30-06, rebuilt to resemble military AK specifications as closely as possible. Heavy barrel, length calculated for average velocity. Krinkov-style flash hider with internal muzzle brake. Ultra-light stocks. locking, folding buttstock. High-intensity weapon-mounted flashlight. American style selector switch (S,F,B). Dragunov scope mount with quick detach. Non-electric 1x optic, optional. XS sights. Beta mag standard, regular mag backup. Internal recoil reducers. Wolf springs. Butt pad. Tactical Sling.

Sidearm: Glock 20, ported, full capacity magazine.