The Mossberg Loc-Box looks pretty good. Methinks it's a potential problem for rapid access:
Storage:
- Load magazine
- Open box
- Open action - round is released into receiver and may fall out or interfere with next step
- Insert receiver into box
- Close & lock box
This leaves the piece with the magazine under-loaded, and probably with a round rattling around in the receiver.
Removal:
- Unlock & open box
- Remove piece
- Close action - is there a round in the chamber at this point???
Having just closed the action while in a rush, you may be startled to hear a "click" (the loudest sound in the world when a "BOOM" is expected) at an inopportune moment, as either the receiver was empty or the loose round fell out. Exepected or not, upon unlocking & removal you may have to cycle the action an unusual 1.5 times (close on empty chamber, open to release next round, close again to chamber live round).
Does all this make sense?