wip rsh-12 + model 89 edit to 50 cal

app/(wiki)/weapons/guns/articles/model_89.md

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-The **Big Horn Armory Model 89 Carbine**, known in-game as the **Model 89**, is a lever-action DMR utilizing the 12.7mm ammunition. It was added to the game in the [v0.16.0](https://github.com/HasangerGames/suroi/releases/tag/v0.16.0) "A Sailor's Dream" update on February 25th, 2024. Found only in [Gold Airdrops](/obstacles/airdrops) and [Flint Stones](/obstacles/flint_stone), it has a slow fire rate but packs incredible damage.
+The **Big Horn Armory Model 89 Carbine**, known in-game as the **Model 89**, is a lever-action DMR utilizing the .50 cal ammunition. It was added to the game in the [v0.16.0](https://github.com/HasangerGames/suroi/releases/tag/v0.16.0) "A Sailor's Dream" update on February 25th, 2024. Found only in [Gold Airdrops](/obstacles/airdrops) and [Flint Stones](/obstacles/flint_stone), it has a slow fire rate but packs incredible damage.
 
 # Background
 The Model 89 was developed by Big Horn Armory to supersede the older Model 86 and Model 92 lever actions in a modern platform. It features a wide variety of options and fires the powerful .500 S&W cartridge. As a CNC-machined rifle, all the parts are exceptionally precise, which gives to its prowess at the range.

app/(wiki)/weapons/guns/articles/rsh12

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+The **Револьвер Штурмовой калибра 12,7 (Assault Revolver Calibre 12.7)**, known in-game as the **Rsh-12**, is a pistol utilizing the .50 Cal ammunition. It was added to the game in the [v0.19.0](https://github.com/HasangerGames/suroi/releases/tag/v0.19.0) "High Caliber Negotiations" update on September 22nd, 2024. The Rsh-12 features a very low magazine size, but extreme damage.
+
+# Background
+The Rsh-12 was created for Russian Federal Security Service for use in high-stakes operations. Designed by Viktor Zelenko of the KPB Instrument Design Bureau, it fires the 12.7x55mm cartridge also used by the VKS sniper rifle and ShAk-12 battle rifle. Unlike most pistols, it fires from the bottom chamber rather than the top. The RSh-12 features a gas system that is purported to be similar to that of the [M1895](/weapons/guns/m1895), and has support for a flashlight, supressor, foregrip, buttstock. Not much is know about if the RSh-12 ever entered production, and if it was ever used. In real life, the large caliber is most likely best suited for anti-material purposes in a close-quarters situation, such as shooting door locks.
+
+# Strategies
+## Using
+- Blank
+
+## Countering
+- Blank
+
+# Obtaining
+Currently, the RSh-12 can only be obtained from the [Golden AEGIS Case](/obstacles/aegis_golden_case) located in the [Headquarters](.buildings/headquarters_meta), and from [Gold Airdrops](/obstacles/airdrops).
+
+# History
+- v0.19.0
+  - Added