I'd like to provide you with some general information on the topic.
In the context of Roblox, "RBXL" files refer to the file format used for Roblox game files. These files contain the game's data, including scripts, models, and other assets.
The term "uncopylocked" refers to a setting or feature that prevents others from copying a game or certain assets within a game. When a game or asset is set as "uncopylocked," it means that other users can copy and use these assets in their own creations.
The mention of a specific file size ("50165 kb") and "high quality" in your query suggests that you're looking for a particular asset or game file that meets certain standards. High-quality assets can include detailed 3D models, sophisticated scripts, or well-designed game mechanics.