Rock River Arms Non-collapsible Tactical CAR stock comes with the spring, buffer, and associated hardware. I'll also throw in the standard plastic grip from the rifle. $40 shipped.
All the prices include shipping USPS priority mail to the CONUS. I prefer paypal, but a money order or certified check will be fine.
Please send email to email@example.com . I don't check im's that often. I can send pictures if you want them.
Thanks for looking.