HK SL6
Encyclopedia
The Heckler & Koch SL6 is a roller-delayed blowback operated sporting carbine
made by Heckler & Koch
. It is manufactured in 5.56×45mm caliber
. The design was originally based on the HK 630 sporting rifle
and is essentially a shorter-barreled version of that rifle. It was marketed throughout the world as a hunting/utility rifle.
The roller-delayed blowback action is similar to that used in the G3
battle rifle and is the hallmark feature of Heckler and Koch's pre-G36
line of small arms. The four groove barrel
features polygonal
rifling
with a right-hand twist of 1 in 10.6 inches. The chamber is fluted with 12 longitudinal flutes extending rearward from the baffle to the chamber face. These flutes permit propellant gases to flow around the case acting as a lubricant to ease extraction. The SL6 has a diopter sighting system and utilizes Heckler and Koch's proprietary HK 05 claw-type scope
mount. Two rectangular recesses have been cut into the upper receiver to accept this mount.
The H&K SL6 is no longer manufactured, having been replaced by the H&K SLB 2000. The H&K SL7 is a variant chambered in 7.62×51mm
caliber. The H&K SL6A2 variant is essentially the same rifle; however, the SL6A2 includes a flash hider and offers a two round burst selector.
Carbine
A carbine , from French carabine, is a longarm similar to but shorter than a rifle or musket. Many carbines are shortened versions of full rifles, firing the same ammunition at a lower velocity due to a shorter barrel length....
made by Heckler & Koch
Heckler & Koch
Heckler & Koch GmbH is a German defense manufacturing company that produces various small arms. Some of their products include the SA80, MP5 submachine gun, G3 automatic rifle, the G36 assault rifle, the HK 416, the MP7 personal defense weapon, the USP series of handguns, and the high-precision...
. It is manufactured in 5.56×45mm caliber
Caliber
In guns including firearms, caliber or calibre is the approximate internal diameter of the barrel in relation to the diameter of the projectile used in it....
. The design was originally based on the HK 630 sporting rifle
Rifle
A rifle is a firearm designed to be fired from the shoulder, with a barrel that has a helical groove or pattern of grooves cut into the barrel walls. The raised areas of the rifling are called "lands," which make contact with the projectile , imparting spin around an axis corresponding to the...
and is essentially a shorter-barreled version of that rifle. It was marketed throughout the world as a hunting/utility rifle.
The roller-delayed blowback action is similar to that used in the G3
Heckler & Koch G3
The G3 is a 7.62mm battle rifle developed in the 1950s by the German armament manufacturer Heckler & Koch GmbH in collaboration with the Spanish state-owned design and development agency CETME ....
battle rifle and is the hallmark feature of Heckler and Koch's pre-G36
Heckler & Koch G36
The Heckler & Koch G36 is a 5.56×45mm assault rifle, designed in the early 1990s by Heckler & Koch in Germany as a replacement for the 7.62mm G3 battle rifle. It was accepted into service with the Bundeswehr in 1997, replacing the G3...
line of small arms. The four groove barrel
Gun barrel
A gun barrel is the tube, usually metal, through which a controlled explosion or rapid expansion of gases are released in order to propel a projectile out of the end at a high velocity....
features polygonal
Polygonal rifling
Polygonal rifling is a type of gun barrel rifling where the traditional lands and grooves are replaced by "hills and valleys" in a rounded polygonal pattern, usually a hexagon or octagon....
rifling
Rifling
Rifling is the process of making helical grooves in the barrel of a gun or firearm, which imparts a spin to a projectile around its long axis...
with a right-hand twist of 1 in 10.6 inches. The chamber is fluted with 12 longitudinal flutes extending rearward from the baffle to the chamber face. These flutes permit propellant gases to flow around the case acting as a lubricant to ease extraction. The SL6 has a diopter sighting system and utilizes Heckler and Koch's proprietary HK 05 claw-type scope
Telescopic sight
A telescopic sight, commonly called a scope, is a sighting device that is based on an optical refracting telescope. They are equipped with some form of graphic image pattern mounted in an optically appropriate position in their optical system to give an accurate aiming point...
mount. Two rectangular recesses have been cut into the upper receiver to accept this mount.
The H&K SL6 is no longer manufactured, having been replaced by the H&K SLB 2000. The H&K SL7 is a variant chambered in 7.62×51mm
7.62×51mm NATO
The 7.62×51mm NATO is a rifle cartridge developed in the 1950s as a standard for small arms among NATO countries...
caliber. The H&K SL6A2 variant is essentially the same rifle; however, the SL6A2 includes a flash hider and offers a two round burst selector.