Item Description
Original Item: Only One Available. This is a fantastic example of an M4 Collimator sight with an equally nice leather M78 carry case. This sight was used on both the US 60mm and 81mm mortar systems. By laying the sight on aiming stakes, the mortar squad could fire indirect missions. The open sight allowed the squad to fire direct lay missions. A collimator sight is a type of optical sight that allows the user looking into it to see an illuminated aiming point aligned with the device the sight is attached to, regardless of eye position (with little parallax). They are also referred to as collimating sights or "occluded eye gunsight" (OEG).
The basic layout of a collimator sight is a closed tube with a lens at its open end and a luminous reticle mounted near the closed end at the focus of the lens, creating an optical collimator. The reticle is illuminated by an electronic light source (an incandescent light bulb or, more recently, a light-emitting diode) or by ambient light gathered behind the reticle via an opalescent window or fiber optic light pipe. Collimator sights are a relatively old idea, being used in many forms for almost 100 years.
This sight is in very good condition with an intact bubble level, and also comes with the original metal carry case.
Information on sight:
SIGHT, M4
STOCK NO. 7579928
SERIAL NO. 132164
Information on M4 carrying case:
CASE, CARRYING, M78
7693845
This is truly a remarkable piece, and would make a great centerpiece to any mortar collection. Ready to display!
- This product is available for international shipping.
- Eligible for all payments - Visa, Mastercard, Discover, AMEX, Paypal & Sezzle
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