A hole in the mount allows access to the magazine assembly for any needed adjustments
105 grams (3.68 oz.)
Any gun can have barrel droop. This 11mm-to-Picatinny (MIL-STD-1913) adapter fits Air Arms S410 and S510 air rifles and compensates for 16 MOA of droop at 50 meters. The mount was designed for the distances usually used by field target shooters...but it'll work for any purpose you decided to use your air rifle. Does not fit S400 or S500 air rifles because the cutout for the loading port requires a different relief.