Threatening messages from Islamic State militants isn’t enough to shake Tim Kennedy, an MMA fighter and former Special Forces officer. In response to FBI intelligence that Kennedy was ISIS’ next target, the veteran decided to design a shirt for military clothing brand Ranger Up that summed up his feelings.

The shirt’s message is short and simple: “Let those cowards come. They can send whoever they want, as long as they don’t want them back.”

Kennedy unveiled the shirt on his Instagram and posted a detailed explanation of its message on his blog. He describes how he has received similar threats throughout his entire military career, and the fact that militants have yet to actually harm the MMA fighters shows that “these gutless attempts at bullying” won’t even pan out.

“They are nothing but cowardly and impotent murderers who prey on the weak,” Kennedy wrote. “They look for soft targets who don’t know how to defend themselves. They seek out the most defenseless in order to make themselves appear stronger than they really are. I’m not a soft target—and they hate that.”

His message to ISIS took a political turn as Kennedy emphasized how he is prepared for anything.

While you and your kind exploit the vulnerable for your own personal gain, I’m here in Texas training hundreds of people to stand up to low-life garbage like you—to actually protect the weak instead of preying on them like a vulture.

I will not be intimidated by you because I train against people far tougher than you’ll ever be, and I do it on a daily basis.

You want a fight? You don’t have what it takes to fight me. You don’t have the courage because you don’t even know what that word means.

But if you do decide to send someone after me—if you actually make an attempt at pretending to be tough—then you can send whoever you want and however many of them you want. Just understand one very important thing.

Don’t expect to get them back.

Well said.

You can view the new t-shirt at Ranger Up here — and don’t forget to get cash back.