First up, my no-expense spared rig. It has about 500 rounds through it and runs like a champ.
LAR Grizzly side-charging upper
Nickel boron bolt/carrier
18" rifle-gas White Oak 1:8 twist 5.56 barrel
JP Adjustable gas block
SJC Titan muzzle brake
Magpul UBR stock
Samson Evolution rail$1500, or $1750
with Atlas Bipod
Benelli Nova 12g 18.5" barrel $350
very low rounds. It has spent most of its life loaded with buckshot and hanging out in the corner.