Sorry to hear about that, glad your not injured, I too have had a squib in a new Sig 556 rifle, the problem was I didn't catch it, and fired another round which cracked the end of the barrel.

Post on Tactical thread,...) and chunked both rounds out.
Sig made it good for $100.00 (not warranty)
If the Neos is good inside and out, you should be fine. Was it new ammo? Old? Top end brand?
Just curious.
Thanks.