MIL-PRF-71167 Cartridge, 7.62Mm: Short Range Training Ammunition Ball - M973 Cartridge, 7.62Mm: Short Range Training Ammunition Tracer - M974This specification describes the performance requirements and verification methods for the Cartridge, 7.62MM: plastic ball, practice M973, and the Cartridge, 7.62MM: plastic tracer, practice M974. These rounds are commonly referred to as Short Range Training Ammunition \(SRTA\). For the rest of this document both rounds will be referenced as SRTA and each single round by its model number. All requirements in this specification apply to both M973 and M974 rounds, unless otherwise noted that they are specific to the M974 round \(see 6.1\).

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MIL-PRF-71167A(AR)

between the text of this document and the references cited herein

the text of this document takes precedence. Nothing in this

document, however, supersedes applicable laws and regulations

unless a specific exemption has been obtained.

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 and interoperability 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 XM974, Trace, 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 12992286.

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 blue in color as defined FED-STD-595 series