Only the receiver requires a 4473 to be filled out and sent to the BATFE
you can buy parts for this gun at www.e-gunparts.com
One can buy parts for a Savage Kimel Kamper KK1 as of 2014 at a few locations. These parts can be purchased through gun retailers, gun auctions, and gun classifieds.
sometimes gun stores will buy them of you
Gun shop
buy one or find parts and build it
midway gun parts
On line auctions, gun shops, gun shows, pawn shops.
MId west gun works.
try e-gunparts.com or bobs gun parts, "gun-parts.com"
Want ads, gun shops, gun shows.
Try Numrich Gun Parts Corp.
I always start any of my searches for gun parts at Numrich Gun Parts Corp.