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cres, spec data, fed, QQ-S-763, class 416; w/plug; 5.875 in. min, 5.885 in. max lg o/a; thd data, 0.860 in.-32 size designation, ns, 0.8431 in. max, 0.8397 in. min pitch dia, 0.560 in. min, 0.580 in. max lg; no special features; designed for specific use, spotting rifle, cal .50, model no. M8C
A chamber, circular in cross section, fixed to the barrel of a gas operated automatic or semiautomatic weapon, such as a carbine, machine gun, rifle, and the like. The deflection of a part of the escaping powder gases puts in motion an integral piston to operate the extracting and reloading mechanism(s).
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
Precious metal content is unknown
The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
HMIC: Hazardous Material Indicator Code. A one position code that identifies a hazardous item.
PMIC: Precious Metal Indicator Code. A one position code which identifies items that have precious metals as part of their content. precious metals are those metals generally considered to be uncommon, highly valuable, and relatively superior in certain properties such as resistance to corrosion and electrical conductivity.
ESD: Electrostatic Discharge. Indicates if an item is susceptible to electrostatic discharge or electromagnetic interference damage. electrostatic discharge damage occurs when an accumulation of static electricity generated by the relative motion or separation of materials is released to another item by direct contact. electromagnetic interference damage occurs when an item comes into proximity with an electrostatic or magnetic field.
ENAC: Enviromental Attribute Code. Identifies items with environmentally preferred characteristics.
CRITL: Criticality Indicator Code. Indicates an item is technically critical by tolerance, fit, application, nuclear hardness properties, or other characteristics.