SIMON breach grenade

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.

IDF soldier with a SIMON rifle grenade
SIMON rifle grenade close up (bottom)

Overview

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]

Specifications
  • Weight: 640 g (including standoff rod)
  • Length:
    • Standoff rod: 400 mm
    • Overall: 730 mm
  • Warhead diameter: 100 mm
  • Explosive fill:
    • SIMON 150: 150 g [2]
    • SIMON 120: 120 g
  • Range: 15 – 30 meters

Operators
Map with SIMON operators in blue

Current operators
  •  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]

References
  1. "SIMON". Rafael Advanced Defense Systems Ltd.
  2. SIMON Brochure
  3. "M100 Grenade Rifle Entry Munition". Army Magazine. Archived from the original on February 28, 2008.
  4. "US Army Awards for Top 10 Inventions of 2005". Defense Industry Daily. June 26, 2006.
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