Possibly one of the single shot .22 Short derringers- although there are miniature firearms that are about .12 caliber. The Kolbri automatic pistol was made in caliber 2.3mm, was small enough to fit on a keychain, but was more a curiosity than a weapon. There is a smiliar Swiss mini-gun revolver being made in limited numbers, but cannot be imported into the US.
The lightest one of weightlifting is feather weight.
Cedar is one of the lightest weight common lumbers available. It is often chosen for its lightness and natural resistance to decay and insects.
Aluminium is the lightest one.
Net books are a great piece of technology. The lightest one is about 2.5 pounds.
Dodge d50 4x4 is one of the lightest i know of weighing in at 2500 lbs curb weight
The average weight of the four chickens is (3.2 + 3.8 + 2.9 + 4.4) / 4 = 3.575 pounds. The weight of the lightest chicken is 3.2 pounds. The difference between the average weight and the weight of the lightest chicken is 0.375 pounds.
The weight of helium is very light, as it is one of the lightest elements on the periodic table. Helium has a very low density and weight compared to other elements.
The weight of the lightest chicken is 0.675 pounds less than the average weight of the four.
Once can purchase a hand gun safe from a variety of different places. Some large gun stores sell hand gun safes. Stores specializing in security will also be able to help.
18 for long gun, 21 for hand gun
Aluminum is a metal for one thing, but yes, the density of aluminum is far less than lets say, Steel.
The one you have in your hand(s) when you need it.