Personally I wouldn't want an add on, simply because I feel the shipka does what it needs to do, and is great for spar and one on one pk. As for the pbp talk. Honestly the pbp has been screwed with so many times it feels like an totally different weapon from when I first bought it, I find it relatively easy to be killed when using this weapon and easy to kill people using it on me, pretty easy to avoid so long as your not right up in someones face. I actually do better with an M4 and Shipka,I can move and dodge quicker and if I need to I can put down accurate shots while backing or getting into a new position. I can't do that with the pbp because of the freeze rate and bullet spread, considering the pbps indivudal pellets do basically nothing it's no big deal to just ignore the gun and take out the person using the pbp from a distance.