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The trailer hitch ball attaches to a ball mount; with a diameter typically 1 ⁄ 16 inch (1.6 mm) larger than the ball bolt/shank diameter. [2] The ball mount must match the SAE hitch class. [3] The ballmount for a receiver-type hitch is a square bar that fits into a receiver attached to the vehicle.
Casemate-mounted 5"/50 caliber gun on the USS North Dakota. A casemate is an armoured structure consisting of a static primary surface incorporating a limited-traverse gun mount: typically, this takes the form of either a gun mounted through a fixed armour plate (typically seen on tank destroyers and assault guns) or a mount consisting of a partial cylinder of armour "sandwiched" between ...
These models are often called adjustable objective (AO or A/O for short) models. Occasionally, a side-focus design (see below) might be used with a fixed reticle within the eyepiece, onto which the second focal plane (SFP) of the target image is shifted by an adjustable erector lens group. While side focus designs are generally considered more ...
The ball sits in a socket, which can be tightened to lock the ball in place. A stem extends from the ball which terminates at the head mount. They tend to have fewer parts than other types of tripod heads due to their simple mechanism, but the parts must be precisely machined to fit well together and provide smooth movement, increasing their ...
To mount aiming optics, a side-rail is permanently attached to the left wall of the receiver which accepts an alloy sliding dovetail rail mount with a clamping lever to which can be attached various telescopic sights and night optics. The mount is detachable from the receiver rail in seconds by swinging the locking lever open and sliding the ...
The sling swivel can quickly be taken on and off by pushing the QD button, which retracts the ball detents. The flush cup sockets can be either rotating or non rotating. Flush cups can be mounted to a long gun in various ways, for instance by drilling a hole in the stock and screwing in flush cup socket, or by using an adapter to other mounting ...
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