carbine rifle

Conversion Gun

Sawn-off Mosin-Nagant M91/30 rifle with SKS rifle grenade launcher, AK-series pistol grip and Burris red dot sight.
7,62x54mmR 5-round internal box magazine, bolt action.

I’m ashamed to say it but I kind of like it, it’s like taking a modern compact gun and replacing everything modern with old wood and steel. Plus come on it’s a Mosin-Nagant who cares if it’s defaced, you can get 5 for 3 at Walmart.

4

Moschetto per Truppe Speciali con Tromboncino modello 91/28 - Carcano carbine with grenade discharger

Manufactured in Italy c.1928-34 as a Carcano-mounted assault mortar, but quickly phased out for a more conventional artillery piece.
6,5x52mm Carcano 6-round en-bloc clip, bolt action repeater, 45cm long specialist carbine barrel.
38,5mm 180g S.R.2 fin-stabilized fuse bomb, loaded through the muzzle in a spiggot mortar, propelled by a Carcano single-shot bolt action loaded with a live 6,5x52mm round, 100-200m range.

S.R.2 grenade

A very interesting weapon prefacing the development of under-barrel grenade launcher, but with obvious quirks that were common in such innovative designs of the era. The M91/28 used a single trigger linked to both Carcano action, but was used with only one bolt at a time to avoid accidental discharge - you could technically use two of them but the rifle’s bolt handle would interfere with the grenade discharger’s bolt. The sights are likewise used for both weapons, with their own sets of graduations.
An interesting note to make is the use of the term blunderbuss to identify rifle-mounted cup mortars in both French and Italian armies of the early 20th century.

Sauce : Forgotten Weapons, ModernFirearms.net

3

M1 carbine with M3 infrared scope

Manufactured by Inland Manufacturing Division of General Motors, scope by American Optical Co. c.1944 - serial number 345402.
7.62×33mm/.30 Carbine 15-round removable box magazine, gas operated semi-automatic, 20k Volt infrared light with 175m range infrared scope, additional foregrip.

Developed at the end of WW2, but also used in the subsequent conflicts involving America, the M3 scope resulted in one of the very first nigh-vision firearm with the German StG44 Vampir system.
As far as I understand it wasn’t mounted on the M1 Garand because of its limited range being better suited to its carbine counterpart.

2

The Lebel Mle. 1886 M93 R35,

Even up to the 1930’s the French Army had vast stores of Lebel rifles, an aging bolt action firearm which originated in 1886.  However the French did not merely want to sell or scrap the rifle, but put them to some use.  A common policy of the French Army in the 20th century was to hold on to weapons no matter how old or obsolete they were.

In 1935 the French Army commissioned a program to shorten many older Lebel rifles in carbines for artillery units, rear echelon units, reserves, police, and colonial forces.  Conversion of the rifle to a carbine was simple, they merely shortened the barrel down to 18 inches and adjusted the length or the forward stock.  Of course this conversion came at a cost.  The Lebel did not have a box magazine but rather a tubular magazine.  Shortening it reduced its magazine capacity to only 3 rounds.  In addition, the R35 still used the aging 8mm Lebel cartridge (8x51R), even though the French Army had adopted the 7.5x54 French.  

The R35 Lebel saw limited used during World War II.  Around 50,000 conversions were produced.