MIL-PRF-71168A(AR)
the text of this document takes precedence. Nothing in this
document, however, supersedes applicable laws and regulations
unless a specific exemption has been obtained.
3.
REQUIREMENTS
3.1 Design verification. When specified in the contract
(see 6.2), a sample of cartridges shall be subjected to design
verification test inspection in accordance with 4.2.
3.2 First article. When specified in the contract (see
6.2), a sample shall be subjected to first article inspection in
accordance with 4.3.
3.3 Product uniformity. The usage, storage and disposal
processes involved with the cartridge require a high degree of
product uniformity. To achieve this uniformity, the
manufacturing processes must keep unit-to-unit variability to the
minimum by controlling the key characteristics. Key
characteristics fall into two categories: (1) those relating to
the product; and (2) those inherent in the manufacturing process.
They include performance, features, reliability, conformance,
durability serviceability, aesthetics, quality and safety. The
contractor shall identify key characteristics of the design and
establish variability limits, or baseline during design or first
article qualification. The variability of key characteristics
for the cartridges submitted for lot acceptance shall conform to
the baseline established for them during design or first article
verification.
3.4 Interface requirements. Each cartridge shall
accommodate the following inputs and interfaces.
3.4.1 Interface and compatibility. The cartridge shall be
functionally compatible with the standard issued M60 and M240B
machine gun. The cartridge shall be capable of being linked with
the XM973, Ball,7.62mm cartridge by using M13 links, loaded,
chambered, fired in the M60 and M240B machine guns and extracted
after firing without binding or use of undue force; without
damage to the weapon and without cartridge-induced malfunctions.
3.4.2 Physical characteristics. The cartridge dimensions
shall conform with interface control drawing 12992285.
3.4.3 External surface. External surface of the cartridge
shall be free of dent, fold, wrinkle, buckle, bulge, chips, dirt,
grease, rust and foreign material. External surface shall be
free of burrs, scratch and sharp edges, which may affect
performance or result in personnel injury during handling.
3.4.3.1 Cartridge identification. The cartridge shall be
readily identified by having one or more components or portions
thereof of being red in color as defined FED-STD-595 series
15,000, 25,000 and 35,000. No visible cartridge component shall
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