I have had bad luck with pre-carves from the P place, two pre-carves, one was flawed, it had 1/8" of wood left on one side of the barrel channel and 3/4" of wood left on the other side. but because I was building a very slender TN rifle, I could make it work. The other had at least 12 major flaws that took me months to fix and then only if you don't look too closely.
My gun building best friend bought 7 pre-carves from them, 5 were perfect, 2 had issues.
Buying a kit from Kibler eliminates the $#@* shoot possibility.