There's no longer a need to search for front and rear bases for your most popular firearms. Weaver Base Pairs feature tough, lightweight aluminum construction to hold up to the most powerful recoil. The Weaver cross lock design means a tight, secure fit on your firearm. These bases accept all Weaver top mount cross lock rings. Fits- Winchester 70 short action (1984+), 70 long action, (Some 70 Coyoteshort actions may take long action base) 670 and 770.