AAI SPIW rifle prototype.
U.S. Army
<a rel="nofollow" class="external text" href="https://babel.hathitrust.org/cgi/pt?id=mdp.39015078436964;view=1up;seq=24">WECOM Orders Continued Development of SPIW</a>. // <i>Army Research and Development</i>, February 1969, v. 10, no. 2, p. 18.