U.S. 120-MM Mortar, M120

Current United States Army Service

A Subject of Mortars in Miniature.com

Click on all photos and scans to enlarge...

M120 Full

The Kit:
This 1/35th scale mode is manufactured in Germany by MR Modellbau and is packaged as the M121, 120mm Mortar. Casting is in white metal and resin with a nicely turned aluminum barrel. Detail on the white metal cast parts is good and the parts clean up nicely with minimal effort. The cast resin Baseplate underside is finely represented however, there is no top side detail. This is due to this same Baseplate being included in MR Modellbau's M1064 carrier conversion and is originally intended to be mounted outside of the carrier with the top-side facing against the outside wall of the tracked vehicle. (Reference the Guest Files page.) There is no Sight Unit provided in the kit.
Parts are packaged in small plastic bags and the assembly instructions included are very vague, actually being copied from FM 23-90 that shows more detail than the kit offers. There are no corresponding part numbers and actual part placement and alignment can be difficult to determine. Assembly was accomplished with cyanoacrylate (super) glue and two-part epoxy for the resin and white metal parts.

There are six finely cast bombs included with this kit with minimal clean up required.

M120

M120

M120

M120

M120

 

M120 Bombs

M120

M120

M120

M20

The Details:
Some part replacements, enhancements and additions were required to convert this model into the M120. The main detail change was the conversion of the kit's M191 Bipod to the M190 Bipod. The replacement legs are made of Plastruct rod and Evergreen card and the spreader chain assembly is constructed out of two strands of sewing thread twisted together and 'sealed' with PVA Glue. The springs are wound fine copper wire and the elevation turn handle is formed from fine wire as well.

M191 Bipod

M120 Unpainted Bombs

M120 Unpainted

M120 Unpainted

M120 Unpainted

M120 Unpainted

The locking and carrying handles on the Baseplate were made from electrical wire with trimmed back insulation, formed and inserted into drilled out mounting holes. The depression was carefully bored out with a sanding drum attached to a Dremel Tool.

Not shown in the pre-paint photos:
The M67 Sight Unit is being represented on the model by the M53 SU as found on the Tamiya
M30, 107mm kit.

The Figure:
Is from the Dragon Models Ltd. (DML) Modern US Marines figure set and he is wearing the DCU uniform and equipment that was also common to US Army soldiers during the opening phases of OIF/OEF. Changes to the basic figure and M16A2 rifle are:

M120 Unpainted Figure

M120 Unpainted Figure

M120 Unpainted M16A2

Not shown in the pre-paint photos:
        The Kevlar helmet's chin straps, fashioned from drafting tape.
        The rifle sling fashioned from note pad paper and styrene bits.
        The water bottle and decal are products of Accurate Armour.

The Base:
Cut from scrap oak to 4 inches in diameter with the edge being routered in with a Dremel Tool. Sanded and stained with a natural colored oil based stain and then sealed with multiple thin coats of polyurethane, lightly sanded in between coats. The wood was masked off with a lo-tak drafting tape to protect from the following applications of water-based groundwork material and the painting process. There are four felt pads and the completion date on the underside of the base.

The Groundwork:
Is a mix of Sculptamold, water and PVA glue. A light sprinkling of finely sifted dirt was added for the desert 'texture' and prior to the mix thoroughly drying, the boot prints were pressed in. Small chunks of Kitty Litter were used sparingly for the 'stones' and these were set in place with PVA glue. The tarp is a piece of OD colored handkerchief cut to size.

Painting, Weathering and Finishing:
The basic painting was accomplished with acrylic and enamel paints. The weathering consisted of Winsor and Newton Oils thinned with Terponoid for the various washes, acrylics paints were used for the dry-brushing and Bragdon Enterprises pastel weathering chalks were applied for the dusting effects.

Decals and Markings:  (There are no decals supplied with this kit)
Depending on the references used, markings and marking locations on the cannon and bombs varied.

Note: A thin coat of Future Floor Wax was airbrushed on prior to and after adding the decals.

The Final Touches:
The final weathering step was the application (by airbrush) of an acrylic flat coat followed by a light touch-up application of the pastel weathering chalks. Acrylic gloss was applied to the figure's sand goggles and to the lenses on the mortar's sight unit.

The nameplate was made from K&S Engineering brass strip that was buffed up with fine steel wool. The lettering is from Letraset and was applied by using a burnishing tool. A strip of  Avery Self-Adhesive Laminating sheet was applied to prevent damage and the nameplate was attached to the wood base with double-sided tape.


General Info:
Developed by Soltam of Israel as the K6, this weapon is manufactured in the United States by various manufacturers and has been in U.S. Army service since 1991. It is the standard U.S. Army heavy mortar and is currently deployed throughout the War on Terror and is fully compatible with NATO smooth-bore mortar ammunition standards. (For live-fire videos, see the Video Clips Page.)

This is a conventional smoothbore muzzle-loaded mortar system that provides increased range, lethality and safety as compared to the post World War II vintage 4.2-inch (107mm) M30 heavy mortar system that it has replaced in the mechanized infantry, motorized, armored, and cavalry units. It is employed as the M120 in the towed version, (as modeled) with M1100 trailer, as the M121 mounted in the M1064 full-tracked carrier and it is the M121 that is scheduled to be deployed in the Stryker 8-wheeled armored mortar carrier that is now in development with subsequent deployment within the next few years. The M121 is fully functional in the ground mode when dismounted from the armored carrier.

Actual Data:

TM 9-1015-250-10

TM 9-1015-250-10
August 1996

M120 H3

Weight: (Pounds)
Cannon (M298):

110.0

Bipod M190 (ground-mount):

70.0

Bipod M191 (carrier-mount):

78.0

Baseplate:

136.0

M67 Sight Unit:

2.5

Trailer (M1100):

399.0

Elevation/Traverse: (approx mils)
Elevation:

0710 to 1510

Each turn of elevation crank:

5

Traverse:
Right or left from center using traverse wheel:

136

With extension:

316

Each turn of traverse wheel:

5

Rate of Fire: (Rounds Per Min.)
Maximum (1st minute):

16

Sustained (indefinitely):

4

Range: (Meters)
Maximum (Charge 10):

7,200

Minimum:

200

Bursting Radius:

75

Crew:
M120:

5

M121:

4

   

M120 Firing positions

M120 Components

Firing Positions

Components

 

M190 Bipod

M191 Bipod

M190 Bipod

M191 Bipod

 

M9 Baseplate

M67 Sight Unit

M9 Baseplate

M67 SU

 

M1100 Trailer

M1100 Trailer

M1100 Trailer

M1100 Trailer

M1100 Trailer

Ammunition Types:

M57 HE
M57 HE
(OD/YEL)

M933 HE
M933 HE
(OD/YEL)

M934 HE
M934 HE
(OD/YEL)

M68 SMOKE
M68 Smoke, WP
(LT GRN/RED)

M929 SMOKE
M929 Smoke, WP
(LT GRN/LT RED)

M121 ILLUM
M121 ILLUM
(WHT/BLK)

M91 ILLUM
(WHT/BLK)

M930 ILLUM
(WHT/BLK)

M983 ILLUM
(WHT/BLK)

M931 Practice
(COLOR UNKNOWN)

XM984 ERMC

M395 PGMM

Fuse Types:

M734 PD
M734 PD

M745 PD
M745 PD

M776 MTSQ
M776 MTSQ

M935 PD
M935 PD


Conclusion:

The Baseplate's lack of top surface detail is the only serious set-back to this model.

References and Sources:

http://www.globalsecurity.org/military/library/policy/army/fm/23-90/ch7.htm

http://www.globalsecurity.org/military/systems/ground/m120.htm

http://www.fas.org/man/dod-101/sys/land/m120.htm

LTC. Rob Gronovius - United States Army
MAJ. Gino Quintiliani - United States Army


U.S. 120-mm Mortar, M120
Comments, suggestions, additional info?

   

 

British 6-Inch Mortar

 [Top]   [Home]

[Home]
[
Soviet M-1938/43] [U.S. M30] [German GrW 42] [German NbW 35] [U.S. M1] [British L16A2]
[German GrW 34] [Japanese Type 97] [Italian 81/35] [U.S. M252] [British 3-Inch]
[German kurzer GrW 42] [British 3-Inch Stokes] [U.S. M2] [Japanese Type 89] [German GrW 36]  [CHICOM Type 1963]
[British 9.45" HTM] [German 7.6cm Minenwerfer] [British 2-Inch SBML] [U.S. M29] [French Mortier 120]
[U.S. T27] [British L16A1] [Soviet M1937] [U.S. M98] [British 6-Inch MTM] [U.S. M120]

[
U.S. M21 MMC] [British FV432(M)] [U.S. M106A1] [British "Tadpole"] [Russian SO-120]
[SPz 52-3] [V-150 AMC] [U.S M4A1 MMC]

[
Three Dwarfs and a Mortar] [Marine Mortar Team] [Catachan Mortar]
[Heavy Infantry Mortar Team] [Assault Mortar Team] [Insurgent Mortar Team]

[The Honor Roll  Page 1  Page 2]

[1/1 Photo Shop  Page 1  Page 2  Page 3]

[Site Awards] [Awards Application] [Guest Files] [Wanted] [Other Models] [Infantry Manuals]
[
Site Updates] [Other Mortar Manuals] [Viewer Comments]
[
The Author] [Links] [Disclaimer]  [Site Map] [Contributors] [Banners] [Video Clips] [BLOG]

Unless otherwise specified, all models built, painted, photographed and are owned by the author.
Mortars in Miniature, Created and Maintained by
Kevin Robert Keefe, Copyright © 2001 - 2008.
 All Rights Reserved.