Description Z2 alloy construction. Stronger than aluminum, but lighter than steel. Base and lower ring all-in-one. Attaches with eight Torx grad tactical screws. Made in the USA. Firearms, trailers, and some accessories are only available for purchase in stores. Each location follows all BATF and individual state/county/city laws to insure the desired product is legal for sale. Any info provided online is subject to change, please go to your local store for more accurate information.