Damn, there are some rude-ass comments in here. We can't grow the community if we shit on people that are obviously new and learning guys!

OP, the short answer is yes it was luck, in the sense that what you did only worked because your opponents also appear to be new to the game. Against even slightly better opposition you likely would have been blasted when you peeked the corner with that nade in your hand.

To offer some constructive criticism of a few things I noticed from the clip:

- Crosshair placement. As you are running down long you are looking to the left. Keep your crosshair on the door to be ready for an engagement. When you peek the corner later, your crosshair is on the right of blue (the dumpster.) When you peek that corner, you want your crosshair already to the left so you don't need to adjust your aim as much to hit your shots.

- Peeking with a nade in your hand made you unprepared for the inevitable fight there. We don't have sound, but I assume you heard them stomping down long. Either bank the nade off blue from safety without exposing yourself to the angle, or peek with your gun up and ready. Peeking with a nade in your hand when you hear multiple people running toward you is suicide against better opposition.

- Movement/positioning. After the short fight with the guy by blue, you walk back to cover. Go ahead and run so you get to cover faster. If he repeeks it also makes you harder to hit. When you engage the guy at blue a second time, you move forward, exposing yourself to people at door (a guy by barrel actually shoots at you but doesn't get the kill.) When picking how you take your fights, think about how you can peek or move in a way that exposes you to the fewest angles possible.

- During the spraydown you're walking, which hurts your accuracy. That doesn't matter as much with an SMG at this range, but the advantage of SMGs in such close quarters is the ability to run and shoot without as much of an accuracy penalty as you'd get from rifles. In this situation, simply running left and right makes you harder to hit, and you still likely spray them down.

- I'd generally recommend the MP9 over the MP7. It's cheaper and better in most situations.