The plastic is like a firmer, slightly slicker R-Pro. It's unfortunately pretty fragile like R-Pro too. They're supposedly working on improving the blend, but I haven't heard anything about it in a while. I begged them to run some in Liquid Metal (great plastic).
I haven't thrown one to compare (don't want to pay those prices), but I want to say that the Lock Jaw is the modern day Piranha because of its overstability. There's a substantially larger amount of fade to it compared to a new heavy DX Polecat, but it's still fairly glidey for being so beefy. If I could get them in a more durable plastic, I would bench Polecats without flinching.
That's pretty cool! You couldn't have hung on for another day?!?! I'll have to remember that this year.