I was wondering if anyone has bought/built an AR15 pistol.

I've decided to add one to my To Build list and am going to use a folding stock adapter (haven't decided which one yet; leaning Law Tactical at the moment). After doing some reading and video watching regarding barrel length pros and cons, I've narrowed it down to either an 11.5" or 12.5" barrel.

This build will be to have a rifle I can easily carry in a discrete pack/bag while on road trips, etc. and have more available than just my CCW, JIC.

All tips and guidance is appreciated. Thanks.