It would appear Walther do unfortunately have name on so called "cheap" guns - have you seen the 1250 Dommie ( I own one), Rotex etc.
They are I believe part of a massive gun group (Hammerli) and as such where the badge ends up is probably not where they would wish it to, from a quality and engineering basis!
Never shot an AR20 but heard good things about them - but it is I believe not put together with the care of an LG300 based Dommie (just sold mine- fool that I am), price point is an indicator there so comparison is a bit unfair - that said the release price for the 1250 was around 1000 dollars I believe and still offered at £600 plus over here - I paid £280 for mine and was dissappointed at that price.
Chopped it up and used it as a 10m project - restocked it and have fun plinking with dipoters in my garage it wasn't worth doing anything else with in my opinion.
FTP900 +Sightron S111 10-50 x 55
AA Pro Target in FWB FP70 stock + MTC Mamba lite
Daystate Airwolf + Bushnell Elite 6500
" life is about the memories we hold and not the things that we own"