Description Front and rear base pairs feature tough, lightweight aluminum construction to hold up to the most powerful recoil. Cross lock design means a tight secure fit on your firearm. Bases accept all Weaver top mount cross lock rings. 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.