Heckler & Koch SL7

The Heckler & Koch SL7 is a roller-delayed blowback operated sporting carbine made by Heckler & Koch. It is chambered in 7.62×51mm NATO caliber and designed and marketed throughout the world as a hunting/utility rifle.^[1]

Heckler & Koch SL7
Heckler-Koch SL7 rifle with 10-round magazine
Type	Semi-automatic rifle
Place of origin	Germany
Production history
Manufacturer	Heckler & Koch
Produced	1980s - 1991
Variants	H&K SL6, H&K 770, H&K 940
Specifications
Mass	8.36 pounds (3.6 kg) unloaded
Length	39.76 in (1010 mm)
Barrel length	17.71 in (450 mm)
Cartridge	.308 Winchester 7.62×51mm NATO .30-06 Springfield (H&K 940) 7×64mm (H&K 940)
Action	Roller-delayed blowback
Rate of fire	Semi-automatic
Feed system	3 or 10-round single column, detachable box magazine
Sights	Rotary rear aperture drum, hooded foresight

Unlike the roller-delayed blowback military Heckler & Koch rifles the cocking handle is situated far more rearward and on the right side and features a camming system to help overcome the initial friction exerted by the "bolt head locking lever" anti-bounce mechanism that prevents the bolt from bouncing off the barrel's breech surface.

The SL7 is no longer manufactured, having been replaced by the Heckler & Koch SLB 2000.

Variants

The HK 770, a hunting rifle 7.62×51mm NATO/.308 Winchester variant of the Heckler & Koch SL7, lacked the wooden handguard of the SL7 and was equipped with a longer barrel with integral flash hider/compensator slots at the end of the barrel, open rear leaf sights, and sporting-style buttstock.^[2]
The HK 940, a hunting rifle long action variant of the Heckler & Koch SL7, designed for using cartridges exceeding the 7.62×51mm NATO/.308 Winchester 2.8 in (71.12 mm) overall length like the .30-06 Springfield or 7×64mm and lacked the wooden handguard of the SL7 and was equipped with a longer barrel with integral flash hider/compensator slots at the end of the barrel, open rear leaf sights, and sporting-style buttstock.^[3]
The Heckler & Koch SL6 is similar in appearance to the Heckler & Koch SL7, but is chambered for the 5.56×45mm NATO.^[4]