I bought this upper:
https://palmettostatearmory.com/psa-10-5-5-56-1-7-nitride-upper-w-o-bcg-or-ch-507020.html
What are my options for hand guards? I’m preferably looking for a quad rail or some kind of option to mount a vertical foregrip. Thank you in advance for your help.
Your options are to get a drop in handguard (carbine length) if you do not want to remove the gas block/FSB or remove the gas block/fsb and get a freefloat handguard (which you will also need to use a low profile gas block for.
As for the vertical grip, unless you have a registered SBR lower you cannot use a vertical foregrip on this upper legally.
I just received notification of approval for 2 SBRs. One is good to go. For the other one, I would like to put a foregrip on the front if possible. So any carbine length drop-in will fit?
Yep. That upper has a carbine length system according to the description.
Awesome. Thank you so much for your help. You saved me some headaches with shipping and returns.
Welcome to the forum @tedisabum 