Yes, this should work on any standard mil-spec lower receiver including any of the PA-15 lowers.
The Strike Industries Billet Trigger Guard w/ Finger Rest will work with Mil-Spec AR15 lowers. So the Strike Industries Billet Trigger Guard w/ Finger Rest should work fine with a Diamondback DB15.
The Strike Industries Billet Trigger Guard w/ Finger Rest will fit Mil-Spec AR15's. Since AR10's vary and don't necessarily have the same standards as AR15's fitment is not guaranteed. I recommend contacting the manufacturer to confirm compatibility with your particular AR10.
The Strike Industries Billet Trigger Guard w/ Finger Rest might fit a Stag Arms AR10. However, since the Strike Industries Billet Trigger Guard w/ Finger Rest was designed for Mil-Spec Receivers I recommend contacting the manufacturer to confirm compatibility.
Yes, these Strike Industries Billet Trigger Guards are anodized.
The Strike Industries Billet Trigger Guard will fit Mil-Spec lowers. So if your lower is Mil-Spec it should fit. But to confirm compatibility I recommend contacting the manufacturer.
Yes, this should work on any standard mil-spec lower receiver, if you are having fitment issues then you may have a defective product, or your lower is not mil-spec.
We recommend contacting the manufacturer, they should be able to provide you with the parts you need. You can reach them here: https://www.strikeindustries.com/contact-us.html
No, this does not interfere with the magazine.
This should fit any standard AR-15 lower receiver that uses standard AR parts. The LWRC direct impingement lowers should accept this trigger guard as well.