High explosive.2C fragmentation.2C and blast United States hand grenades

1 high explosive, fragmentation, , blast

1.1 mk ii , mk iia1
1.2 mk iii, mk iiia1, , mk iiia2
1.3 m26/a1/a2, m57 , m61
1.4 m33, m33a1/m59, m67, , m68
1.5 scalable offensive hand grenade
1.6 et-mp

high explosive, fragmentation, , blast
mk ii , mk iia1

more commonly known pineapple, mk ii series (also written mk 2) common fragmentation grenade of second world war. mk ii had grooved exterior intended aid fragmentation of grenade. however, later studies showed design has no effect on fragmentation, though provide non-slip surface improves grip. filling either ec blank fire powder (approx. 0.75 oz or 21 g smokeless small arms powder) or flaked tnt (approx. 2 oz or 57 g); tnt became common filler 1942 onwards.

the mk ii available in little-known he-blast (better known concussion) variant , combined effect he-frag variant. largely superseded mk iii series. mk iia1 (also written mk 2a1) used m10a2 or m10a3 fuzes, upgrades previous m10a1 fuze used in mk ii. later reissued mk ii variants featured modern m204 series fuze.

mk iii, mk iiia1, , mk iiia2

unlike mk ii, mk iii (also written mk 3) cylindrical grenade designed used offensive weapon clearing rooms, trenches, , other enclosed spaces (i.e., @ close range). concussion grenade, mk iii series designed incapacitate through pressure , impulse produced explosion. mkiii had far larger tnt filling mk ii series; 8 oz (230 g) of tnt, in comparison 1.8 oz (51 g). although minimum-fragmentation grenade, large fragments (most fuze assembly, or surrounding material) projected far 200 m (660 ft) detonation point. differences between mk iii, mk iiia1 (also written mk 3a1) , mk iiia2 (also written mk 3a2) improved versions of m6 fuze: mk iii featured m6/a1, mk iiia1 m6a2, , mk iiia2, m6a3. later reissued mk iii variants featured modern m206 series fuze.

m26/a1/a2, m57 , m61

the m26 series in many ways upgrade in basic principle of mk ii: shaped, not visibly ribbed, fragmentation grenade. m26 has filling of composition b contained within sheet steel two-part outer shell covers prenotched fragmentation coil inner liner. use of inner liner creates highly predictable fragment pattern , casualty radius. grenade found have problems incomplete detonation of filler, , m26a1 featured tetryl booster ensure complete detonation. m61 grenade product of further product improvement project or pip, , identical m26a1 exception of additional safety clip spoon of grenade on m61. m26a2 identical m26a1 except being fitted m217 impact fuze. m57 equivalent of m61 m26a1, , same m26a2 exception of additional safety clip on spoon of grenade.

m33, m33a1/m59, m67, , m68

similar in format m26, m33 spherical fragmentation grenade filled composition b explosive. unlike m26, inner wall prescored , not contain fragmentation coil. grenade has smooth surface, unlike mk ii series pineapple casing. m67 part of similar pip, , identical m33 exception of additional safety clip spoon of grenade on m67. m33 grenades more of oval shape before transitioning on more spherical shape of m67. m67 current issue he-frag grenade military. m33a1 impact version of m33, using m217 electrical impact fuze in place of normal delay fuze. @ unknown time m33a1 redesignated m59. there should no difference between these grenades except m33a1 may more ovular in shape more spherical m59. m68 same m59, exception of additional safety clip.

scalable offensive hand grenade

in 2010, socom began fielding scalable offensive hand grenade delivers blast effects. grenades stackable, meaning 3 can connected increase blast power. base grenade has non-removable, 3.5 second fuse , body encasing .25 pounds (110 g) of high explosive, 3 connected grenades can have .75 lb (340 g) of blast force.

et-mp

picatinny arsenal developing enhanced tactical multi-purpose (et-mp) hand grenade combine fragmentation , concussive effects in single weapon. grenade fills gap left withdrawal of mk3a2 concussion grenade service in 1975, used clear bunkers detonating in confined spaces blast pressure reverberate off walls, exterior coating contained 50% asbestos, can hazardous troops when inhaled. in room after 1 detonated inside; left m67, introduced in 1968, anti-personnel grenade in inventory. et-mp allows soldiers choose between fragmentation , blast overpressure effects flipping switch. has improved safety, being first insensitive munitions-qualified lethal grenade in army’s portfolio electronic fuse, or delay mechanism, instead of mechanical fuse can narrowed down milliseconds and, until armed, not able detonate. grenade designed ambidextrous use, same arming procedure used either hand, whereas m67 required different procedure left-handed use. research et-mp grenade began in 2010, entry expected in 2020.