Yeh its an PTS Centurion Arms ERG. Had the Magpul RM4 ERG previously and sold it and regretted it.
The kick on them is easily comparable to a GBBR. I had a GHK AK74 and this thing kicks just as much as that without the hassle of gas guns.
I think its better than the TMRS series and cheaper. Its more durable, has equivalent range, greater kick, has the stop on empty feature the same as the TM. The only thing it lacks is the reciprocating bolt but I can live without a tiny piece of metal going clang every shot. Also, less to go wrong.