This bolt is incredible. All the great stuff mentioned on pbreview.com and pbnation.com, its all true. The bolt makes the gun slightly quieter which is nice. On top of that it makes my gun more accurate then it already is, and my gun is very accurate. If you upgraded the barrel on your gun, then this is definitely the next upgrade for your piranha, you won't be disappointed.
Get it if you havn't already, well worth the money.