Ever since 2013, Metal Auger has been a worse version of Shred.  For a much higher capacity cost, you can have a bit more punchthrough and still not have the fire rate bonus provided by Shred.  Then, you added Seeking Fury, which is like Seeking Force, but costs less and has a bonus to reload speed.  Finally, you added Primed Shred, which, for the same cost as a maxed Metal Auger, provides a hair more punchthrough and +50% fire rate. The capacity costs for Metal Auger, Seeking Force, and Se