The discs make the rifle completely waterproof. Knight makes a conversion kit, but most believe the kit is a downgrade and not as good as the discs. I have both a Thompson Center and a Knight Disc extreme. If I want reliabiity and accuracy I use the Knight. If I want something quick and still accurate I take the T/C.

In all fairness to my T/C, I'm sure eventually I will get it dialed in like my Disc Extreme is, but it's taking more time than I anticipated to find the perfect load. My Knight was dialed in right out of the gate with 110gr triple 7 and a 250 grain red hot. The T/C is a bit more selective.

I'm not a huge fan of the newer Knights and prefer the older Disc Extreme.

Just my opinion..