Tippman should know if you sell their products or not if you are buying directly from them, right? If you are buying through another wholesaler who sells their products, this should be perfectly traceable to the source of a supply chain. Because you have such low prices, I doubt your chain is too long.
Yes, they will bully you, because you are underselling other dealers and effectively lowering market value of their product.
The other day someone told me how big companies bully smaller targets - deep pocket bully recognizes a "credible threat" (meaning you). Bully files a (frivolous) lawsuit (patent, trademark, etc etc) and throws enough paperwork on the target to keep them busy and distracted from core business. After few mills spent in legal fees there is a settlement, but the target already lost momentum.
I was suprised when I heard this. But apparently happens every day.