Grey Ghost receiver set. Parts compatibility?

[Nomad91]

Hello all, this is my first post so apologies if this is in the wrong place.

Just wondering what LPK, bolts and barrels are compatible with Grey ghost receivers. My friend has a set and I’d like to help him compile a parts list while all of the holiday sales are going on.

Thanks in advance  ✌

Edited November 22, 2021 by Nomad91

[Armed Eye Doc]

Is this what he has?

https://greyghostprecision.com/ggp-ar-mkii-billet-ar-10-receiver-set/

What is he looking to do with his future rifle?  That will affect recommendations.  

[98Z5V]

If that is indeed the set, then this is the important information on that page:

• Functions with nearly all available DPMS pattern large frame parts
• Rail height is DPMS High
• DPMS thread pitch front bore

[Nomad91]

Thanks y’all