...Picatinny accessory rail Adjustable recoil-pad CALIBER 4,5 (.177) 5,5 (.22) 6,35 (.25) 7,62 (.30) BARREL FX Smooth Twist X Superior Liner *all except caliber 4,5 which use STX. Compact: 4,5 (.177) Length 500 mm 5,5 (.22) Length 500 mm 6,35 (.25) Length 500 mm 7,62 (.30) Length 500 mm...