SD-15 Guide For Performance SpecificationsThis document provides guidance information on performance specifications focusing primarily on stating requirements in performance terms and ensuring that sufficient verification means are included in the specification to evaluate conformance. While the focus of this document is on defense specifications developed under DoD 4120.24-M, Defense Standardization Program DSP Policies and Procedures, the principles and techniques can also be applied to program unique performance specifications, performance-based purchase descriptions, commercial item descriptions, or any other type of procurement specification. This guide is intended to supplement the format and content requirements for writing performance specifications found in MIL-STD-961, Defense and Program-Unique Specifications Format and Content.

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Performance Specification Guide SD-15

4.5.2 Ambidextrous. The Tactical Sling shall be observed to ensure it is ambidextrous. The Tactical Sling shall be mounted to the M16 and M4 along with the ancillary equipment during this verification process.

4.5.3 Quick release. The Tactical Sling shall be demonstrated to ensure it has a one-handed quick release type fastener to separate the weapon from the fighter as described in requirement. The Tactical Sling shall be mounted to the M16 and M4 along with the ancillary equipment during this verification process.

4.5.4 Non-interference. The Tactical Sling shall be attached to a M16 and M4 series rifle and the tester shall assume various fighting positions to ensure that the Tactical Sling does not interfere with the use or function of the weapon.

4.5.5 Compatibility. The Tactical Sling shall be verified for compatibility by conducting verification 4.4.1, 4.4.2, and 4.4.3 while the operator is dressed in MOPP IV or arctic gear.

4.5.6 Weapon systems attachment. The Tactical Sling shall demonstrate it can be attached to the M4 and M16 series rifle without the use of any tools.

4.5.7 Silent. The Tactical Sling shall demonstrate it can be silent from a distant of 10m(T)

and 5m(O) through user testing:

• Three testers shall be positioned 10 meters facing away from the Tactical Sling attached to a M16 series rifle.

• Operator shall carefully (while attempting to make as little noise as possible) assume and rotate through these firing positions (refer FM 3-22 manual): Standing Firing Position, Kneeling Unsupported Firing Position, and Alternative Prone Firing Position. Testers shall raise their hand if they hear the Tactical Sling during the procedure.

• Operator shall repeat the rotation of the firing positions for a total of five times.

• Tactical Sling shall pass the silent test if all three testers do not raise them hand once during each transition to the next firing position.

• Repeat Silent test with testers 5 meters away from the Tactical Sling (O).

4.6 Environmental verifications.

4.6.1 Operational temperature.

4.6.1.1 Extreme hot. Tactical Sling shall be attached to a M16 series rifle and shall be conditioned to a temperature of 155°F in accordance with MIL-STD-810 for 3 hours. 210 rounds shall be fired from the M16 series rifle. Firing shall take place no greater than 6 minutes

from temperature chamber removal. If the time before firing is exceeded, the Tactical Sling with the M16 shall be reconditioned at the extreme high temperature for an additional 30 minutes before firing. The Tactical Sling shall be inspected for signs of degradation or flaws during and after firing.