I printed a hoffman tactical lower.
here is the filliment that I used for this.
https://www.amazon.com/gp/product/B07981FP16/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B07981FP16&linkCode=as2&tag=boogalooexpre-20&linkId=cb6a6032eae6d0cdfc6f833f305b3489