Millet LRS-1 6-25x 56mm, and 35mm Tube with Rings Included Heavy duty one piece main tube provides the foundation for precise lens alignment and other components Shock-proof scopes need to absorb the heaviest recoil and field handling conditions without failure The reinforced variable power zoom ring serves to seal and support the eyepiece securely The use of water resistant sealants, synthetic grease and secure O-ring seals protect against fogging Buck gold scopes have a unique coil spring system which applies uniform pressure