Hey all , I sold my CVA, and my old Traditions inline years ago, since I hadn't hunted in a few years. Circumstances change, and I got a new GF with two young boys who want to learn to hunt. Stopped into the lgs today after work, and bought a used Knight Revolution 50.

 I regretted it as soon as I got home and hit google.
I had no idea about the fpj (or whatever it's called) the counter guys at the shop didn't either, I guess. I bought a box of 209s, but no "primer condoms" .

I pulled the breach plug, and ran a brush down it, the bore looks good.
The trigger housing has a serial number, so I guess it has already been recall serviced.
WTF is this plastic thing I need? and has anyone else experienced a blowback issue with one of these?

So did I buy a dog? Should I just try and get my $ back? (only a hundred bucks)
Go easy on me, it's been a few years since I had a muzzleloader, and this was an impulse buy to get the boys their first deer.

I have an old Knight Disc Extreme. I found the plastic jackets at Midway. There are two styles.

http://www.midwayusa.com/s?targetLocation=%2F_%2FN-0%2B4294966074%2B23211%3FNp%3D2%26Nr%3DAND%2528p_visible%253A1%252Ccustomertypeid%253A1%2529%26Nrpp%3D24%26Ns%3Dp_metric_sales_velocity%257C1%26Ntpc%3D1%26Ntpr%3D1