scope:

This specification covers bullet-resistant vision blocks of two different types of construction, designed for use in combat type vehicles. In addition, this specification covers vision blocks with and without laser protection filters (see 6.1).

Vision blocks covered by this specification will be of the following types, classes, and duties (see 6.2 and 6.5.1). All classes and duties are applicable to types I and II:

Type I - Steel cased. Type II - Plastic cased.

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: U.S. Army Tank-automotive and Armaments Command, ATTN: AMSTA-TR-E/BLUE, Warren, MI 48397-5000, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document, or by letter.

Class 1 - All-glass laminated construction. Class 2 - Composite-laminated glass-plastic construction. Class 3 - Transparent, laminated plastic construction. Duty A - Light (see 6.5.1). Duty B - Medium (see 6.5.1). Duty C - Heavy (see 6.5.1).

intended Use: