These USA Made handgaurds are constructed from hard core 6061 T6 Aluminum and are compatible with any mil-spec upper. The Go Gear Direct Team has selected some color options. If you don't see what you like or you want mulitple colors, contact us and we wiil get it for you. Available in 4 lengths. 7"(6.85") weighing 5.2oz 9"(8.82") weighing 6.8oz 12" (11.82"