If that gun was the only thing standing between you and a bunch of angry, armed Jihadis you might be happier with this one than some of the other options. Although a DPP is pretty much bulletproof.
I think guys who make a living putting themselves in extreme danger worry way less about the cost of these things than us mere mortals do.
Then again, I know at least a couple operators, well, recently retired operators, who swear by Holosuns and say if they were deployed again they would pick a 510 over an Eotech.