But the screw type is less likely to come loose.

The screw type is easier to install.

There are numerous screw types that work perfectly, and have been around for years.

Many times when tightening the screws of the four screw type, the scope can twist in place causing misalignment.

Both cost about the same, but the screw type is easier to install.

Dual screw type is more often seen in use because they are very efficient.

The breach was of interrupted screw type; the recoil system hydropneumatic, variable length.

The breechblock was of interrupted screw type, with forced cartridge case extraction.

Following are some of the most common screw types:

The breech was of the interrupted screw type.