Two of my ARs have a Palmetto State Armory lower, with a Spikes Nickel Boron lower parts kit w/ ambi. safety, KNS pins, Ergo Grip, Spikes winter trigger guard, NiB trigger and hammer, etc. Lancer mags.

In the first picture...

The top, all black gun with the scope is a .204,
Shilen SS 24" 1:9 barrel,
Spikes Nickel Boron Bolt Carrier Group,
AR Precision upper,
Hogue free float tube,
Magpul PRS stock and BAD lever,
Vltor BCM Gunfighter Mod 4 charging handle,
Enidine recoil buffer,
Tubb flatwire CS spring,
Burris XTR rings,
Bushnell 3200 10x fixed 40mm Mil-dot scope.

The scope-less gun is a .204 Sabre Defense upper with a 1:12 24" fluted barrel,
This just has a plain ol' Daniel Defense or Spikes lower parts kit - I forget.
Magpul PRS,
nothing else too fancy.

The dark earth is:
5.56 Wylde AR Performance 16" 5R 1:8 barrel,
D-Tech free float tube,
Red X upper,
R-Guns Nickel Boron Bolt Carrier Group,
BCM charging handle,
Magpul CTR stock and ASAP sling plate,
Burris P.E.P.R. QD mount,
Burris Fullfield TAC30 1-4x scope
I forget what kind of muzzle device from AR Performance.

Same guns, different angle.