PPA-CF vs PA6-CF?

Does anyone have experience printing PPA-CF and PA6-CF? I had read that “PPA-CF is 48% stronger” than PA6 if you get good layer adhesion, but I’m seeing conflicting info regarding impact resistance. Anyone have input who’s printed and used both?

  • TixbomberEnglish
    1·
    18 hours ago

    I have over 800rds through a PET-CF Defiance lower receiver, with brass inserts for the trigger assembly. They are 100% a viable option, and I’ve had 0 issues with cracking or breaking of the original I printed. I just wanted a one-piece design. The only part of the lower that gets worked and is prone to breaking is the buffer tube mount. There’s 0 “pressure” in an AR lower, to worry about “tensile strength” in that regard.

    • The ShittinatorMAEnglish
      1·
      17 hours ago

      You may want to look into Middleton’s GAP: https://guncadindex.com/detail/Grandmas-Apple-Pie-GAP-v15:6

      You buy the metal buffer tower from a parts vendor and print the lower. Comes with an ambi bolt catch and dovetails, as Middleton is wont to do. It’s not one-piece, but it slims the lower significantly since it takes force from a more manageable angle.