View Full Version : difference between the USG and IOM.

03-06-2005, 09:58 PM
What is the difference between these two guns? I own one with the double circle trigger guard and my dad owns one with the regular trigger guard and different checkered grips. Is one a USG and the other a IOM?

03-06-2005, 10:42 PM
Your Five-seveN is an IOM and your dad's is a USG.

The trigger-guard is the main difference between the two, but the grip pattern is also different on the USG (rougher, better grip), and the magazine catch is different and bigger. The USG comes standard with 20-round magazines, but the IOM comes with the old 10-round mags.

The Five-seveN was originally double action, but now all versions are single action. There is also a "Five-seveN Tactical" which isn't readily available to civilians, and it looks exactly how the original DA Five-seveN did, but with a manual safety. It can be found occasionally online for a higher price than the others.


03-07-2005, 12:58 AM
I believe the older IOMs didn't have a magazine disconnect saftey, which the newer USGs do.

03-07-2005, 09:04 AM
Yes, IOM's and the IOM/USG both have magazine safeties...the fixed sight tactical which is still dept. only does not have one, and nor does the older DAO.

03-07-2005, 06:45 PM
I am just a regular old fool, but I got a Tactical. Bought it way back when though.

03-07-2005, 07:19 PM
Thanks for the help guys.