G&P ones are discontinued IIRC, or atleast on very short supply. A&K had one awhile back but like all China clone companies they were closed down by the government, so no more A&K Masada besides it had alot of problems.
Magpul themselves literally a week or 2 ago just came out with the PTS Masada which is actually made by Magpul or actually officially licensed by them but seeing that it's a PTS it's probably was made by the company.
"Don't you know the first law of physics? Anything fun costs atleast $8"