The SIMON is an Israeli bullet-trap rifle grenade designed to breach through doors, developed by Rafael Advanced Defense Systems. It is intended for use with 5.56 mm rifles such as the M4 carbine.
The SIMON is an Israeli bullet-trap rifle grenade designed to breach through doors, developed by Rafael Advanced Defense Systems. It is intended for use with 5.56 mm rifles such as the M4 carbine.
The system consists of a bullet-trap tail section which slides over the muzzle of the rifle, an explosive midsection and a front standoff rod. The grenade is propelled by a normal ball or tracer round to a maximum range of thirty meters and is detonated by the impact of the standoff rod against the door to be breached, the standoff distance allowing the blast wave to affect as much of the door surface as possible, negating any need to aim for hinges or locks.
A version which is manually attached to the door is also available, known as "static SIMON". [1]
Israel 
United States - A variant of the SIMON 120 is in service with the U.S. Army as the M100 Grenade Rifle Entry Munition (GREM). Changes from the original specification involved fuzing and reliability issues. [3] An inert round, the M101 GREM-Target Practice (GREM-TP) allows training for accuracy without the explosive hazard. The system was given a U.S. Army award as one of the top ten best inventions of 2005. [4] 
Belgium - Used by the Belgian Federal Police Special Units supported by the French GIGN during an anti-terrorism raid in Verviers (Belgium) in 2015. [5] 
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The term Grem may refer to:
Military equipment produced by Rafael Advanced Defense Systems | ||
|---|---|---|
| Missiles, rockets, and projectiles |  | |
| Remote weapon stations | ||
| Air-defense systems | ||
| Surface vehicles | ||
| Electronic Warfare | ||
| Miscellaneous | ||
1 Joint venture with IAI.2 Joint venture with DSTA.3 Joint venture with Raytheon.4 Joint venture with Hatehof.5 Joint venture with Northrop Grumman. | ||