Are there two kinds of barrel lengths for Marauder .22 Air Pistols?

If your Prod is stock than it should only come with the shorter shroud. Everyone is right about making it quieter. It also looks like factory to non original Prod owners. The stock barrel didn't meet my expectation after trying 10 different pellets. I went with a 15" MM barrel so the extend shroud was mandatory. Accuracy is amazing and more velocity. I've been able to take small game out to 60 yards. Haven't tested it any farther but there's still enough FPE to get the job done.