Remember this quite well, long time ago.The Springfield Armory Single Shot 1911-A2 otherwise known as the 1911-A2 SASS.
View attachment 29403
1911-A2 SASS
Yes no mag. The magazine well was used to accomodate the locking mechanism.I know it was a single-shot with a magazine, but how on Earth could you fit .308 cartridges in that grip (much less anything longer than .45-Colt)?
I'm guessing the larger rifle calibers were single-shot only....no mag...