my experience with the 4 position Leapers would lead me to find something different.
I used one recently for a build for a buddy. He wanted to keep the AR as cheap as possible while still using quality parts.
I was adament that I be allowed to pick barrel, BCG, lower and upper receivers, LPK, and assorted small parts.
I didn't specify buttstock so he chose the aforementioned version.
the detent spring retaining plate didn't fit flush on the rear of the receiver and actually created a 1/4" lip. The buffer tube appears to be painted black and is OBVIOUSLY a vry cheap cast or extruded "metal" (sounds odd when tapped with keys as compared to others).
I told my friend that as long as he didn't buttstroke anyone, drop the rifle, or apply undue pressure to the buffer tube he should be ok.
IMO, for your personal rifle spend the xtra cash and get a good piece.