mel5141has it right - either/or. Nice to note tho that MX8 spares retrofit the Comp 1 with no problem. It will effectively never wear out.
The Tula chokes are easily discerned by looking into the clean muzzle choke area. Nothing else looks like it. The shark-gill porting is factory on all Tula choke bbls AFAIK since I have a 90's Tula choked bbl with them still. And a '76 Mirage skeet same way. The bbls should not be 26" they are 70cm which is almost 28". Least every one I've seen was. The long bbls are super fad but WGAF? The long bbl bozos make for incredible buys on shorter bbl guns! Thank You, George Digweed!!!
Tula chokes were made for fiber wad loads and build up plastic pretty fast if you use plastic wads. Pattern-wise the chokes don't seem to care which in my experience.
A primo Comp1 Skeet will sell currently for +/-$2.5K but if you got a good buy why sell? For about 99.99% of skeet shooters you have as good a gun as $ can buy.
have a day
Dr.WtS
