Its pretty easy to hit 7# or so with a scope on a short action internal mag if you buy all ultralight components and a short thin barrel. If you want to hit 7# with a long action and a decently long barrel you will probably have to go to a Carbon Fiber stock. Most likely with any 7# build you will need a Leopold Ultra light scope and ultralight rings.
Here are some weights.
SA w bolt egw base and mach lug with blind mag 36 oz
LA flt bk w bolt EGW base, lug, w DBM bx/mag – 40 oz
LA flt bk w bolt EGW base, lug, w internal mag – 38 oz
STOCKS
SA tupperware stock - 29 oz
SA duromax stock - 43 oz
LA DBM factory stock with complete magazine – old style - 38 oz
LA tupperware stock w some epoxy - 32 oz
LA duromax stock - 44 oz
Choate LA tactical – 4#
Choate Ultimate Varmint – 4.5#
Choate Ult Sniper – 6#
BARRELS
19" 308 cut down sporter barrel and nut – 36 oz
EST 16" 308 cut down sporter bbl - 32 oz
EST 20" 308 Pencil Barrel - 30-32 oz
24" 338 WM barre1 and nut - 51 oz
24" 358 wheln shaw bbl and nut - 58 oz
21" 458 wm barrel and nut - 48 oz
Cut 20" 358 whelen bbl and nut - 50 oz
Factory blued 22" 270 bbl - 41 oz
21" stainless 270 factory barrel and nut - 38 oz
30” bull barrel 308 and sav long action with mag and EGW base
30” bull barrel 308 – 107 oz ?
SCOPES
2-7x VX-1 leupold scope - 11 oz
1-4x VX-2 - 9 oz
Nikon prostaff 4-12x mildot - 14 oz
Sightmark 1-6x - 20 oz
Leupold 3-9x Ultralight - 9 oz
Sightron 10-50x – 29 oz
20xSS 22 oz
Misc
Factory recoil lug - 1 oz
Machined recoil lug - 1.5 oz
Burris extreme med rings, 1/2" - 6 oz
Burris extreme med rings, 30mm w 1 tac top - 6.2 oz
Burris zee rings steel low - 3 oz
Lightweight 308 Build - 6.8#
20" 308 pencil barrel - 32 oz
Short action with bolt weaver base and machined lug with blind magazine and action screws - +- 34 oz
SA tupperware stock - 29 oz
3-9 VX-2 ultralight - 9 oz
Lt rings - 3 oz
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