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Description
The Vektor R4 is a 5.56×45mm assault rifle designed in 1979 based on the IMI Galil rifle.It entered service as the standard service rifle of the South African Defence Force (SADF) in 1980.[1] The R4 replaced the R1, a variant of the 7.62×51mm FN FAL. It was produced by Lyttelton Engineering Works (LIW, "Lyttelton Ingenieurswerke"), now Denel Land Systems.
The weapon is a licensed variant of the Israeli IMI Galil assault rifle with several modifications; both the stock and magazine are now made of a high-strength polymer and the stock was lengthened, adapting the weapon for the average South African soldier. Other detailed differences include the R4's lack of a carry handle and a number of improvements made to its internal operating mechanism.

the R4 is a selective fire, gas-operated weapon that fires from a closed bolt. As with the Galil parent weapon, the operating system is derived from that of the AK-47. It uses ignited powder gases channelled through a vent in the barrel to drive a long stroke piston located above the barrel in a gas cylinder to provide power to the operating system. The weapon features a self-regulating gas system and a rotary bolt breech locking mechanism (equipped with two locking lugs), which is rotated by a helical camming groove machined into the bolt carrier that engages a control pin on the bolt. Extraction is carried out by means of a spring-loaded extractor contained in the bolt and a protrusion on the left guide rail inside the receiver acts as the fixed ejector.

The R4 is hammer-fired and uses a trigger mechanism with a 3-position fire selector and safety switch. The stamped sheet steel selector bar is present on both sides of the receiver and its positions are marked with letters: "S"— indicating the weapon is safe, "R"—single-fire mode ("R" is an abbreviation for "repetition"), and "A"—fully automatic fire. The "safe" setting disables the trigger and secures the weapon from being charged.

The R4 is fed from a synthetic box magazine with a 35-round cartridge capacity (designed to use the 5.56×45mm NATO cartridge with the M193 projectile) loaded in a staggered configuration. During the 1980s South African troops were issued with one 50-round magazine as well. The flash suppressor is slotted and doubles as an adapter for launching rifle grenades. Bolted to a bracket in the gas block, under the barrel, is a lightweight folding bipod (folds into the handguard), which includes a wire cutter in the hinge
Source: Wikipedia
Imagine Source: upload.wikimedia.org/wikipedia…

Description
The Vektor R4 is a 5.56×45mm assault rifle designed in 1979 based on the IMI Galil rifle.It entered service as the standard service rifle of the South African Defence Force (SADF) in 1980.[1] The R4 replaced the R1, a variant of the 7.62×51mm FN FAL. It was produced by Lyttelton Engineering Works (LIW, "Lyttelton Ingenieurswerke"), now Denel Land Systems.
The weapon is a licensed variant of the Israeli IMI Galil assault rifle with several modifications; both the stock and magazine are now made of a high-strength polymer and the stock was lengthened, adapting the weapon for the average South African soldier. Other detailed differences include the R4's lack of a carry handle and a number of improvements made to its internal operating mechanism.

the R4 is a selective fire, gas-operated weapon that fires from a closed bolt. As with the Galil parent weapon, the operating system is derived from that of the AK-47. It uses ignited powder gases channelled through a vent in the barrel to drive a long stroke piston located above the barrel in a gas cylinder to provide power to the operating system. The weapon features a self-regulating gas system and a rotary bolt breech locking mechanism (equipped with two locking lugs), which is rotated by a helical camming groove machined into the bolt carrier that engages a control pin on the bolt. Extraction is carried out by means of a spring-loaded extractor contained in the bolt and a protrusion on the left guide rail inside the receiver acts as the fixed ejector.

The R4 is hammer-fired and uses a trigger mechanism with a 3-position fire selector and safety switch. The stamped sheet steel selector bar is present on both sides of the receiver and its positions are marked with letters: "S"— indicating the weapon is safe, "R"—single-fire mode ("R" is an abbreviation for "repetition"), and "A"—fully automatic fire. The "safe" setting disables the trigger and secures the weapon from being charged.

The R4 is fed from a synthetic box magazine with a 35-round cartridge capacity (designed to use the 5.56×45mm NATO cartridge with the M193 projectile) loaded in a staggered configuration. During the 1980s South African troops were issued with one 50-round magazine as well. The flash suppressor is slotted and doubles as an adapter for launching rifle grenades. Bolted to a bracket in the gas block, under the barrel, is a lightweight folding bipod (folds into the handguard), which includes a wire cutter in the hinge
Source: Wikipedia
Imagine Source: upload.wikimedia.org/wikipedia…