Firearm coatings

The National Firearms Act of 1934 was rather modest by modern standards. It didn t actually outlaw machine guns or sawed-off shotguns, but it imposed a 200 tax on their manufacture, sale, and ownership—a rather high amount of money at that time. (Because they are short enough to conceal beneath a coat, sawed-off shotguns have long been considered a weapon of particular usefulness to criminals.) The law also required that purchasers of such weapons undergo an FBI bac%round check. 

Some firearms are plated with anodized aluminum, nickel, or chromium which gives durability and good looks, and some are made from stainless steel which is much less prone to rust than conventional steel. Electroless nickel coating is an alloy coating of 88% to 96% nickel and 4% to 12% phosphorus, which is produced by chemical (not electrical) reduction of nickel on to the metal surface. 

Experiments were conducted involving the addition of tracer compounds to the propellant, followed by an examination of the discharge particles to determine if any of the particles and which type contained the tracer.173 The tracer was found in primer particles only, which supports the proposition that they should be found dissolved in the oxides and salts originating from the primer and not in the bullet particles. A similar experiment involving the coating of bullets with metals not normally associated with firearms ammunition, followed by examination of the discharge particles, supported the proposition that the bullet material makes a contribution to the primer particles. 

The surface coating of a random selection of firearms was examined and the results are given in Table 20.10. The elements detected in Table 20.10 do not fully reflect the wide range of elements mentioned in Chapter 15. 

The most common microtraces examined in criminalistic laboratories are so-called contact traces (i.e. small fragments of paint coating, glass, single fibres, soil, writing materials). Moreover, traces of flammable liquids originating from fire debris or traces pointing to the use of firearms are revealed and identified. 

R D and testing of a polymer coated microcantilever trace explosives detection system (see discussions below on the Bureau of Alcohol Tabacoo and Firearms (ATF)/Naval Research Laboratory (NRL)/Oak Ridge National Laboratory (ORNL) system). 

Lawman Clean-Fire leaves the range air and your firearm cleaner. Fired cases don t show the usual soot coating you see in most regular ammunition. Velocities and bullet weights are the same as most Gold Dot products for realistic practice. ... 

Uses Lubricant candles chewing gum dental wax explosives film pkg. firearms floor polish furniture polish hot-melt adhesives matches paints paper rubber food and food-contact applies. chewing gum base protective coating on fruits, vegetables defoamer... 

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