The new super lightweight Charger is in stock. From LVJ:
"We are experimenting with new materials. A lot of people wanted a lightweight option. The new aluminum Charger is less than a third of the weight of steel and brass. We considered that this may actually be too light, but you can always add weight. Now, you can hit the weight rule of some organizations by adding weight exactly where you want it."
Type 5052 aluminum contains 97.25% Al, 2.5%Mg, and 0.25%Cr, and its density is 2.68 g/cm3 (0.0968 lb/in3). Generally, 5052 aluminum alloy is stronger than other popular alloys such as 3003 aluminum and also has improved corrosion resistance due to the absence of copper in its composition.
These are less than 1/3 the weight of a brass or steel Charger.