By this time, we must be up to Mark XX or so.

They say the first Mark XX went and committed suicide on 'em; but, hell, at least it had a reason.

The Mark XX mount was fully enclosed and supposedly weatherproof; in service, crews found otherwise.

As a result, the axes of the guns were very widely spaced, a feature instantly obvious with the Mark XX mounting.

The Mark XX mounting permitted an increased elevation to 50 degrees (compared to 40 for previous marks).

The four-fingered hand looked practiced and capable around the stock of the Mark XX.

Galactese plus that Mark XX, this is a new game.

He pointed the Mark XX at Orne's head.

Beginning with the Mark XX, Bolos were equipped with a psychotronic brain which gave them artificial intelligence.

"It's true the Mark XX is obsolete by Concordiat standards," Fife said carefully.