 1 Full Length view of experimental lightweight No.4 rifle, note the lack of a receiver buttsocket and the one-piece stock.
|  2 Full length view of the rifle.
|  3 View of action. Note standard No.4 rifle mag, but swept forward bolt handle and lack of a buttsocket.
|  4 Note the lightening cut in the buttsocket and the ventilated recoil pad.
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 5 Note the lightening cuts in the stock.
|  6 View of receiver area. Note swept forward bolt handle and lightening cuts to the receiver.
|  7 Note the experimental model number (J-5550) and serial number (12) stamped on the top of the handle, as opposed to along the back.
|  8 Note the stock re-inforcing bolt located below the bolt handle.
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 9 Note the unique trigger guard and the stock re-inforcing bolt.
|  10 Note the lightened receiver compared to a No.4 rifle. Although the rifle wear a Mk1 sight altered ala T pattern (ie, removal of battle aperture), it's thought it was issued with a stamped and folded sheet metal sight.
|  11 Side view of action. Note the hollowed bolt handle.
|  12 View of receiver ring. Note the Mk1* type bolt release.
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 13 View of bolt release, Mk1* type.
|  14 Note the lightening mill cuts along the receiver side wall. Also note the model and serial number markings on top of the receiver ring.
|  15 Note the experimental model number and serial number on top of the receiver ring.
|  16 Note the finger groove in the forestock and the lightening cut along the interface between the handguard and the forestock.
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 17 Note the typical No.4Mk1 type stock band and sling swivel.
|  18 Detail view of the stock lightening cuts.
|  19 Note the thin barrel profile and the typical No.4 rifle type nose-ieces on the handguard and stock.
|  20 Note the unique front sight guard and thin profile barrel.
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 21 Quarter view of rifle. Note the unique front sight arrangement.
|  22 Note the front sight and multi-groove rifling.
|  23 Note the unique split front sight arrangement, apparently held in position by a barrel key in a slot, and secured by opposing transverse screws. the barrel accepts the standard No.4 rifle bayonet.
|  24 Full length view of experimental lightened No.4 rifle.
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 25 Note the unique front sight arrangement reminiscent of the No.1MkVI "waisted" front sight.
|  26 Note the non-typical lightening mill cuts in the receiver, also note the lightening cut behind the late-pattern Longbranch safety switch.
|  27 View of receiver area showing the material milled away as compared to a standard No.4 action.
|  28 Note the stock re-inforcing bolt.
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 29 Note the mill cut behind the safety lever.
|  30 Note the low mauser-style thumb cut in the receiver sidewall and the amount of material removed as compared to a standard No.4 action.
|  31 top view of action.
|  32 Top view of open action.
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 33 Note markings on bolt handle and swept-forward shape ala P14 bolt.
|  34 Top view of closed action.
|  35 View from rear with raised sight.
|  36 Bottom of barrel, note bottom of front sight assembly.
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 37 Standard Lee Enfield No.4/No.5 type magazine.
|  38 Stock wrist.
|  39 Note the rubber ventilated butt pad markings, reminiscent of the EAL butt pad.
|  40 Rear view of rifle.
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