What was the Special Purpose Individual Weapon program?

The Special Purpose Individual Weapon (SPIW) was a long-running United States Army program aimed at developing a rifle capable of firing flechettes. Although various prototype designs were tested across later initiatives like the Advanced Combat Rifle program, none achieved the necessary performance improvements to replace the M16.

What we know

• The Special Purpose Individual Weapon was a long-running United States Army program to develop a flechette-firing rifle. [2]
• The concepts explored in the SPIW program were later tested in the Future Rifle Program and the 1980s Advanced Combat Rifle program. [2]
• The Advanced Combat Rifle program included prototype flechette-firing assault rifles built by manufacturers like AAI and Steyr. [3, 4]
• The ACR program ultimately ended because none of the entrants achieved a performance level 100% better than the M16A2 baseline. [3, 4]

Where to go next

• a case in pointHow did the AAI ACR prototype function?
• the bigger pictureWhat was the Advanced Combat Rifle program?
• what followedWhy did the military fail to replace the M16 rifle?
• what caused itWhat was Project SALVO?
• an unexpected connectionWhat ammunition does the 125 mm smoothbore gun use?

Sources

• [1]Special Purpose Individual Weapon (Wikidata Q7574693) · CC0 1.0
• [2]Special Purpose Individual Weapon · CC BY-SA 4.0
• [3]AAI ACR · CC BY-SA 4.0
• [4]Steyr ACR · CC BY-SA 4.0
• [5]125 mm smoothbore ammunition · CC BY-SA 4.0