These Browning Rifle rails are compatible with both Picatinny and Weaver scope rings.
The Browning BLR/BAR Long Action Picatinny Rail fits both Long Action (above .308 calibre but not including the .308) and Short Action rifles.
The Browning BLR Short Action Picatinny Rail fits Short Action rifles up to and including .308 calibre.
4 screws 6-48×1/4″ are included.
20″ lbs torque is recommended and a drip of “blue” loctite (not supplied).