I have owned and used 3 different Detroit 'portable' Bullet Traps in my time as a Firearms Examiner for a local Crime Lab, all of which were used indoors with plenty of ventilation. The picture supplied makes it difficult to determine the length of the trap and whether it has a pull-out tray that catches the lead and jackets. If it has this tray then it was advertised as being able to take 'any' handgun ammunition. Of course, bear in mind, this was before anything larger than .44 mag was on the market. Complete measurements of the face and the length & depth of the entire unit as well as a side picture would make it easier to tell which one you have. Mine was used daily for many years and the only maintenance required was an occasional cleaning and tray emptying. Granted My work only required firing of 8-10 rds. daily (I managed to up that number significantly to keep my eye sharp and for anger management). I also had one at home set up for .22 cal sporter rifle practice at 50 ft. A side benefit to reloaders is that copper jackets tend to separate completely making the mining of lead much easier. Hope this helps.
