For one gun ?
Over all it's sound, little expensive and non-standard ( LS piston) but if that's what you want go for it. The extra do dads are where weapons go wrong when you need them. I would get rid of the extra levers and extensions.
I see no "forward assist" on this PWS.............................Ask Kyle Rittenhouse if it's a good thing ....YES IT IS! It saved his life while looking into the muzzle of a 9mm.
BAD lever has got to go. I can't stand them, rinky dink solution waiting for a problem of itself to become. I would throw it away...really. Fluid motion of loading the mag then hitting the bolt catch release isn't that hard to learn, it's ZEN like. Practice...
Bi-pod not needed for a 300m or less shot, ditch it.
11.8" barrel is an odd measurement. For one gun only IMHO; 12.5" or 16" would be my choices to ponder over and with a "one gun" mindset the 16" has the margin. 12"/12.5" is the shortest of the long and longest of the short barrels, anything shorter than 12" should be a larger cal. 300BLK, Grendel etc.. No doubt short barrels will hit at distance but the extra velocity makes a hit more probable and easier due to a little less drop and ability to buck a cross wind while still having some energy. Past 200 meters 5.56 starts to falloff quick.
The Credo 1-6x is good glass, better than the Credo 1-4x which I once had. I think they were trying to get too much out of the lens system in the 1-4 and at higher power little things became noticeable. You made the right choice in the 1-6x. I still found my Leup MK 4 1.5-5x 20mm had a better picture throughout all settings over the Credo 1-4x. Can't beat a Leup MK4 for the value...gone are those days.
Off set red dot not a bad idea vs. iron BUS.
To me it looks like you have a very nice set up for a max 300 meter lead thrower/Home defense tool. Nothing wrong with it as long as you know it's limitations and yours when using it.
Train train train and enjoy.
"Beware of the man with one rifle", he likely knows how to use it.