It takes a great deal of skill to get a kill with the pro-pipe. At least compared to other power weapons. You have to wait until it's within a certain distance from your target, and you have to detonate it at the right time, before it moves out of that optimal kill range. A person picks up the pro-pipe and would be lucky to get one kill with the damn thing before he or she dies or runs out of grenades trying to take one person down. You're taking a bigger risk using the pro-pipe against a DMR user in medium range than you would be taking a rocket launcher in medium range and close range, or a shotgun/sword/hammer in close range.