Zombie36,
I've attended the Cavalry Arms armorer's seminar where we were instructed on how to assemble the CAV-15 lower.
The assembly is slightly different than a standard receiver, but not more difficult.
Because they are molded into the lower, there is, of course, no separate buffer tube, trigger guard or pistol grip. The usual pivot and take-down pins, along with the associated springs and detent pins, have been replaced with Quick Take-down pins. These pins have a built-in detent ball which allows quicker and easier removal for cleaning and maintenance.
If you have basic hand tools and follow the instructions included with the receiver, you should have no trouble assembling a CavArms lower. My son (20) built his and had no trouble at all.
If you do run into a snag, we're here to help.
My CAV-15
[img]http://photos.ar15.com/WS_Content/ImageGallery/Attachments/DownloadAttach.asp?sAccountUnq=6693&iGalleryUnq=11&iImageUnq=34[/img]