To successfully navigate the Weapons Lab in Metal Gear Solid Delta, your initial step involves incapacitating Raikov as he exits the locked storage room located in the East Wing. After dealing with him, ensure you hide his body to avoid detection and don his uniform and mask. This disguise is crucial as it grants you access to restricted areas of the lab while maintaining your cover. Remember to utilize stealth tactics throughout your movements—avoid running or making contact with the guards to minimize suspicion.

Once you’re appropriately disguised, head to the large room on the first floor filled with crates and shelves to locate the Scorpion SMG. It’s important to equip suitable camouflage for your surroundings while also being mindful that you need to swap out of the scientist disguise if you intend to wield any weapons within the lab. By following these steps, you not only move forward in the mission but also edge closer to rescuing Sokolov and achieving your overall objectives.