These guys don’t build junk and their products are of the highest quality with a matching, yet reasonable price tag. AEGIS Creative & Research International Limited, a.k.a. ACRI is behind the Hephaestus brand and specializes on high end gas blow back products for a selected few weapons and makes.
Hephaestus Custom Thunder HTs-14
This summer Hephaestus (Greek God of Blacksmiths and son of Zeus) announced the HTs-14 GBBR a replica of the Russian OTs-14 Groza which is close to a release now. They have just posted a few more photos showing off the finished construction with some magnet demonstration proving all parts are made of steel.