PTR/CETME mag question

[MK20]

Will a CETME mag fit a newer PTR 91? I came across a company selling them by the crate for 4 bucks per but don't want to drop a bunch of money on them if they won't fit.
The interwebs is showing mixed conclusions.

Thanks.

 

[MK20]

?

 

[BCP]

Yes but those used mags are used, some might not fit or feed properly for whatever reason. When I had my PTR91 I used the aluminum G3 mags that are everywhere for 5-7 bucks without issue.