For details of the ‘every-day’ spares tools carried within the MG Section, please visit the Spares Page.

How armourers used these gauges and tools is covered in some of the manuals found on this page: Armourer’s Documents & Parts Lists.


Bags

  • Cat No. B2/BC 3016, List of changes A 1599, BAGS, ARMOURERS M.G., MK. 1, EMPTY – Demand as “Bags, armourers, S.A., Mk. 1” – Leather; with shoulder strap and buckle, and 2 buckles for flap straps; for tools and components for repair of small arms in the field.

Chests

  • Cat No. C1/SM 13GA, List of changes C 3480, CHESTS, INFANTRY WEAPONS EXAMINATION, NO. 2, MK. 1 – Wood; with 10 blocks and 5 trays containing gauges, tools and selected components to service – Guns, machine, Bren, .303-in., Browning, .30-in., Polsten, 20-mm., Vickers, .303-in., Mk. 1 and Mtgs., tripod, M.G., Mk. 4B

General Tools:

  • Lamps, brazing

General Routine Order 1081 dated 13 August 1915

Lamps, brazing

Approval is given for the issue of one “Lamp, brazing, 1-pint” to each Infantry Battalion and Cavalry Regiment for the use of Armourer Serjeants in carrying out repairs to machine guns.

Indents should be sent to Ordnance Officers concerned.


Gauges

  • SM 7A – Armourers, selected, sear

A selected component with spring. For checking action of lock or comparison with similar component.

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  • Cat No. C1/SM 36A, List of changes C 4045, GAUGES, Inspectors, Plug, testing, adaptor, condenser, Mk. I – Steel
  • Cat No. C1/BD 2507, PLUGS, Test, adapter, condenser, Vickers .303-in. M.G., Mk. I – With cap and retaining pin

Steel plug assembled to gun-metal cap and pin. Insert plug in adaptor and secure by the cap. The shoulder on the plug must be flush with the top surface of the cap.

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  • Cat No. C1/SM 37A, List of changes C 4045, GAUGES, Inspectors, Level, spirit, M.G., Mk. 1 – Brass and glass.

General purposes.

  • Cat No. C1/SM 38A, List of changes C 4045, GAUGES, Inspectors, Cases, spirit level, Mk. 1 – Wood; for M.G. spirit level
  • Cat No. C1/SM 74, List of changes C 421 and C 3298, GAUGES, ARMOURERS, Plug, .306-in., No. 1, Mk. 1 – For checking .303-in. barrel wear

Steel, barrel wear. Inserted in breech end of barrel.

An alternatively marked example

  • SM 124 – Armourers, plug, 0.301 in., Mk. 1.

Steel, plug accept bore. Barrel held vertically.

  • SM 125 – Armourers, plug, 0.307 in., Mk. 1.

Steel, plug reject. Inserted at muzzle end.

  • SM 128 – Armourers, plug, lead, No. 2, Mk. 1.

Steel, plug reject. Inserted in the chamber.

  • SM 139 – Armourers, headspace, .064 in., No. 1

Steel, low limit. Inserted in the extractor lip of the lock and into the chamber.

  • SM 164 – Inspectors, plug, 0.088 in., Mk. 1

Steel, reject diameter of striker hole. Inserted in the firing pin hole on the extractor.

  • SM 171 – Inspectors, straight edge, 8″, Mk. 1

Steel, bevelled edge. General purposes.

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  • SM 172 – Inspectors, level, spirit, Mk. 1

Spirit level mounted on steel bar.

  • SM 174 – Inspectors, sleeve, plug, Mk. 1

Steel, sleeve. Used in conjunction with SM 292.

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  • SM 175 – Inspectors, plug, 0.64 ins., Mk. 1

Steel, reject gland muzzle attachment. Inserted in the barrel bearing of the gland muzzle attachment.

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  • SM 178 – Inspectors, headspace, .058in., Mk. 1

Steel, for checking gib seating. Gauge inserted on the gib face and held by the gib and spring.

  • SM 179 – Inspectors, plug, .303in. and 0.253in. Mk. 1

Steel, reject compound. The 0.303in. plug inserted in the left side of the tumbler pin hole. The 0.253in. plug in the right side of the tumbler pin and trigger pin hole.

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  • SM 180 – Inspectors, plate, 4.445in. and 4.438in. Mk. 1

Steel, accept, reject lock assembled. Assembled lock cocked and side levers held parallel to the lock flange. Gauge applied between the head of the side levers and the cartridge seating face of the extractor.

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  • Cat No. C1/SM 181, List of changes C 3298, GAUGES, ARMOURERS, Firing pin protrusion, No. 6, Mk. 1 – Limits H .068-in. L .056-in.; for Gun, machine, Vickers, .303-in.
  • SM 182 – Inspectors, cartridge, head, 0.07in. Mk. 1

Steel, reject extractor cartridge groove. Applied to the cartridge grooves of the extractor.

  • SM 183 – Inspectors, plate, 0.627in. Mk. 1

Steel, reject diameter of barrel bearing. Applied at 1in. from the muzzle end for distance of 1.50in. towards the breech end.

  • SM 184 – Inspectors, plug, 0.565in. Mk. 1

Steel, reject diameter of crosshead joint pin hole on gun and mounting. Applied to the right side of the crosshead joint pin hole of the gun and mounting.

  • SM 185 – Inspectors, plug, 0.45in. and 0.445in. Mk. 1

Steel, rejecting diameter, of elevating pin hole on gun and mounting. Plug 0.45in. applied to the right side of elevating joint pin hole of the gun. Plug 0.445in. applied to the left side as above and both sides of the inner screw, elevating gear of the mounting.

  • SM 186 – Inspectors, plate, 0.556in. and 0.436in., Mk. 1

Steel reject diameter of joint pins. Gap 0.436in. applied to pin, joint, elevating gear. Gap 0.556in. applied to pin, joint, crosshead.

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  • SM 187 – Inspectors, plug, 0.567in., Mk. 1

Steel, reject crosshead joint pin hole. Applied to left crosshead joint pin hole.

  • SM 201 – Armourers selected No. 2 right extractor lever

Selected component. For checking action of lock or comparison with similar components.

  • SM 202 – Armourers selected No. 2 left extractor lever

Selected component. For checking action of lock or comparison with similar components.

  • SM 203 – Armourers selected No. 2 firing pin

Selected component. For checking action of lock or comparison with similar components.

  • SM 204 – Armourers selected tumbler

Selected component. For checking action of lock or comparison with similar components.

  • SM 205 – Armourers selected trigger

Selected component. For checking action of lock or comparison with similar components.

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  • SM 291 – Armourers, headspace, 0.07in., Mk. 1

Steel, reject. Applied to the cartridge guides on the extractor in the vicinity of the firing pin hole from the bottom of the extractor.

  • SM 292 – Inspectors, plug, compound, 0.306in. and 0.3007in., Mk. 1

Steel, used in conjuction with SM 174. Ensure casing M.A. assembly is without play. Place the assembled gun vertically on its crosspiece. Plug SM 292 assembled to SM 174 is placed in the cone of the M.A. and into the barrel. The sleeve SM 174 is placed in the bullet exit of the cone and the plug is fully inserted into the barrel until the plug handle contacts the sleeve.

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  • Cat No. C1/SM 346, List of changes C 4045, GAUGES, Inspectors, Plate, .75-in., Mk. 1 – Steel; reject; distance from lips to top of extractor.

Steel, reject lip of the extractor. Applied to the top of the extractor in line with the lip of the cartridge guides.

  • Cat No. C1/SM 347, List of changes C 4045, GAUGES, Inspectors, Plug, .304-in., Mk. 1 – Steel; reject; dia. of barrel bore; for .303-in. M.Gs.

Steel, plug reject bore. Inserted in the muzzle end of the barrel.

  • Cat No. C1/SM 348, List of changes C 4045, GAUGES, Inspectors, Plug, .309-in., Mk. 1 – Steel; reject; dia. of barrel bore; for .303-in. M.Gs.

Steel, reject bore diameter. Inserted in the breech end of the barrel.

  • Cat No. C1/SM 349, List of changes C 4045, GAUGES, Inspectors, Length bar, 4.509in., Mk. 1 – Steel; reject; distance between connecting rod nut and barrel face.

Gun assembled less fusee spring and box. Lock assembled with extractor, extractor levers and side levers. Nut connecting rod not less than 0.498in. long. Nut screwed home tight without adjusting washer. Gauge placed on the connecting rod and plug inserted in the chamber.

  • Cat No. C1/SM 351, List of changes C 4045, GAUGES, Inspectors, Plug, .5602-in., Mk. 1 – Steel; accept; dia. of hole for crosshead pin joint

Steel, accept joint pin holes, gun and mounting. Inserted in joint pin holes of crosshead and gun.

  • Cat No. C1/SM 352, List of changes C 4045, GAUGES, Inspectors, Plug, .4402-in., Mk. 1 – Steel; accept; dia. of hole for elevating joint pin

Steel, accept joint pin holes, gun and mounting. Inserted in the elevation joint pin holes on gun mounting and inner screw, elevating gear.

  • SM 360 – Inspectors, plug, large cone, No. 1, Mk. 1

Steel, accept and reject, mouth of large cone. Inserted in the chamber of the barrel.

  • SM 361 – Inspectors, plug, small cone, Mk. 1

Steel, accept and reject, position and form of small cone from barrel face. Inserted in the chamber of the barrel.

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  • SM 362 – Inspectors, plug, position of shoulder in chamber

Steel, accept and reject, concentricity of form of shoulder. Inserted in the chamber of the barrel.

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  • SM 363 – Inspectors, plug, large cone, No. 2, Mk. 1

Steel, accept and reject. Inserted in the chamber of the barrel.

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  • Cat No. C1/SM 364, List of changes C 4045, DIES, SIZING, BARREL THREAD, MK. 1 – Steel; for Guns, machine, Vickers .303-in.

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  • Cat No. C1/SM 426, List of changes C 4045, GAUGES, Inspectors, Firing pin protrusion, repair, Mk. 1 – Steel; limits H 0.065in., L 0.058in.

Lock assembled and in the fired position, gauge applied to the striker point.

  • Cat No. C1/SM 441, List of changes C 4045, GAUGES, Inspectors, Profile, side-lever, .303-in. Vickers M.G., Mk. 1

Steel, checking profile of side levers. Side levers assembled to the plate with the side levers bush. Plate held against the stop. Bents will be checked on either side.

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  • Gauge, Firing Pin, V.M.G., .5-inch.

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  • Plug, Breech End, Barrel Casing

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  • No. 985

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  • No. 4568, Gun, Vickers .303, Spring Buffer, S.U. Muzzle Attt. Ball

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  • Plug, Reject, Mouting, Tripod, Tumbler Pin Hole, .5-inch

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Dial sight checking level

  • Cat No. C1/CM 14A, List of changes B1479 and B3615, LEVELS, Checking, M.G. dial sight, Mk. I – Consisting of Plug, spirit bubble, cap and taper pin

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  • Cat No. C1/BD 6440, List of changes B 5106 and B 7470, LEVELS, CHECKING, M.G. DIAL SIGHT, MK. 1 – In box
  • Cat No. C1/VE 0013, List of changes B 2426 and B 5106, BOXES, LEVEL, CHECKING, M.G. DIAL SIGHT, Mk. 1 – With 2 safety hooks
  • Cat No. C1/CGB 5154, List of changes C 1920, BOXES, LEVEL, CHECKING, M.G. DIAL SIGHT, C, Mk. 1A – with metal disc

Tripod repairing tools

  • Cat No. C1/BD 9260, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Bushes, loose
  • Cat No. C1/BD 9261, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Cutters, Facing, external
  • Cat No. C1/BD 9262, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Cutters, Facing, internal
  • Cat No. C1/BD 9263, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Cutters, Recessing
  • Cat No. C1/BD 9264, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Cutters, Sizing
  • Cat No. C1/BD 9265, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Jigs, Drilling
  • Cat No. C1/BD 9266, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Jigs, Reaming
  • Cat No. C1/BD 9267, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Pluds, spotting
  • Cat No. C1/BD 9268, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Reaming, Finishing, 1st
  • Cat No. C1/BD 9269, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Reaming, Finishing, 2nd
  • Cat No. C1/BD 9270, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Reaming, Leg, No. 1
  • Cat No. C1/BD 9271, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Reaming, Leg, No. 2
  • Cat No. C1/BD 9272, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Reaming, Leg, No. 3
  • Cat No. C1/BD 9273, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Reaming, Leg, No. 4
  • Cat No. C1/BD 9274, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Reaming, Leg, No. 5
  • Cat No. C1/BD 9275, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Reaming, Leg, No. 6
  • Cat No. C1/BD 9276, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Slips, jog, drilling
  • Cat No. C1/BD 9277, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Taps, Finishing
  • Cat No. C1/BD 9278, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Taps, Leg
  • Cat No. C1/BD 9279, List of changes C 3336, TOOLS, BUSHINGS, CROSSHEAD, .303-IN. M.G. TRIPOD MOUNTINGS, Wrenches
  • Cat No. C1/BD 8957, List of changes C 3336, TOOLS, REPAIRING, CROSSHEAD, .303-IN. M.G. TRIPOD MTG., Bars, boring – For Mk. 4B tripod mtg.
  • Cat No. C1/BD 8958, List of changes C 3336, TOOLS, REPAIRING, CROSSHEAD, .303-IN. M.G. TRIPOD MTG., Bushes – For Mk. 4B tripod mtg.
  • Cat No. C1/BD 8959, List of changes C 3336, TOOLS, REPAIRING, CROSSHEAD, .303-IN. M.G. TRIPOD MTG., Drills – For Mk. 4B tripod mtg.
  • Cat No. C1/BD 8960, List of changes C 3336, TOOLS, REPAIRING, CROSSHEAD, .303-IN. M.G. TRIPOD MTG., Taps – For Mk. 4B tripod mtg.
  • Cat No. C1/BD 2659, TOOLS, REPAIRING, .303-IN. M.G. TRIPOD MTG., Punches, swaging, Plain, Mk. 1 – For Mk. 4B tripod mtg.; For tumbler bearings in crosshead
  • Cat No. C1/BD 2660, TOOLS, REPAIRING, .303-IN. M.G. TRIPOD MTG., Punches, swaging, Ring, Mk. 1 – For Mk. 4B tripod mtg.; For trunnions of tumbler

Sources:

Specific source references can be provided if required.

Some information sourced from: R.E.M.E. Central Inspectorate. Inspection Standards (Provisional). Part 3 – Application of Gauges and Examination of Small Arms and Machine Guns. Issue 1. Feb 1957.