Anyone Had Any Experience with...

[Marine A5 Sniper Rifle]

Sons of Liberty Gun Works in San Antonio? They appear to make a quality product with a large following.

[lyman]

never heard of them till now,

but there are maybe eleventy hundred or more folks either buying receivers w/ their name on it, or setting up a CNC

[BlitzKrieg]

Costs no more to buy a known name brand. In long run, it costs far far less.
I'd look hard at AERO.