My STG77 2017 gun is CL but that was due to it being a limited run aniversary gun.
Was also advertised as the 1st 20 inch CL barrrel made in the USA.
My 2020 M3A1 is nitraded like all the modern ones.
OP
You,can get a new AUG with 2 barrels and AUG factory 1.5 optic from PSA
For,like 200 cheaper then that gun listed @ buds.
Or any AUG for 700 cheaper @ PSA.
Bought my 40th anny gun from PJ
Got the 2nd from PSA during the AUGust sale.
They are blowing the M3A1 out cheap cause Steyr has a model they are releasing.
https://palmettostatearmory.com/catalogsearch/result/?q=steyr+aug