Rapax HULK High Velocity Spring (4+ J) SRS TAC41 SSG VSR GIB1 Uniquely shaped exit pupil acts Kleur:Everglade Uniquely shaped exit pupil acts as an integrated shun shade Two Point Sling for Sniper Rifles Also suitable for SG550 551 552 A high quality spring machined in Europe by Rapax for SRS Characterized by a lighter pull