You have no screenshots.
Since you are new I will let you know that the stance that the mods are taking is if you don't post screenshots your thread will be locked.
I will give you a little time to post screenshots.If I were you I would do it without delay.
A few pointers:
The modernday weapons are located in the generic weapons section.There you can find weapons like the python and the uzi or, in this case the commando.The tavor is a sci-fi weapon but you are free to use it however you wish.You are the one making the game.
If you make rooms too big and there is nothing in them it won't matter what the pc's specs are.There will be lag.Long hallways and large open areas can cause this as well.
Please post screenshots immediately or your thread will be locked.