The Leofoto MA-30 (Knob Clamp) is one of the most light-weight and compact rifle heads on the market with a ball diameter of only 30mm. Built for any job with a picatinny and arca compatible hybrid dual clamp, this ball head is ready for any rail. Constructed from hard anodized, aircraft-grade 6061-T6 aluminum the MA Series rifle heads are built to last.