Maybe five pieces with an LWRCi Compact.
My B5 Bravo hasn’t needed anything to tighten it up on a variety of receiver extensions. It is beyond snug on an LMT extension.
I have one on my BCM and it's pretty snug. Very minimal wobble. Try the Magpul SL line. Those have two small leaf springs in the stock that push up on the buffer tube, causing a very tight, snug fit.
If it wobbles remove the stock and try a .5" x 1" strip of self-sticking velcro (loop) length-wise on the top rear of the receiver extension.
The civilian ones with the QD swivel are tight. The military issue ones are a little bit looser. I much prefer the military issue ones because they're tight enough to not wobble but loose enough to be able to adjust easily.