Here are some weights

If you have an 18" pencil barrel made, use ultralight rings, 2-7x scope, and a
tupperware stock you would be good to go with a stevens action. Should weigh about 6.5# total dry
with scope.

Short action Stevens CF with bolt Weaver base and machined lug with mag - 35 oz
SA tupperware stock - 29 oz
SA duromax stock - 43 oz
19" 308 sporter barrel and nut - 35.5 oz

Long action SS flat back with bolt EGW base, no lug, w mag and action screws - 36 oz
Factory recoil lug - .8oz
Machined recoil lug - 1.2 oz

LA tupperware stock w some epoxy - 32 oz
LA duromax stock - 44 oz

2-7x VX-1 leupold scope - 11 oz
1-4x VX-2 - 9 oz

Burris extreme rings, 1/2" - 6 oz