Modern Firearms - Heckler-Koch HK SL-6 SL-7
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Heckler-Koch SL-6 SL-7 rifles (Germany)

 

7.62mm / .308 Heckler-Koch Model 770 hunting rifle.
 7.62mm / .308 Heckler-Koch Model 770 hunting rifle.

 

 5.56mm / .223 Heckler-Koch SL-6 rifle with 10-round magazine.
 5.56mm / .223 Heckler-Koch SL-6 rifle with 10-round magazine.

 

7.62mm / .308 Heckler-Koch SL-7 rifle with 3-round magazine.
 7.62mm / .308 Heckler-Koch SL-7 rifle with 3-round magazine.

 

7.62mm / .308 Heckler-Koch SL-7 rifle with 10-round magazine and telescope sight.
  7.62mm / .308 Heckler-Koch SL-7 rifle with 10-round magazine and telescope sight.

 

  HK SL-6 HK SL-7
Type / action roller-delayed blowback
Caliber(s)  5.56x45 / .223 Rem 7.62x51 / .308 Win
Weightunloaded 3.6 kg 3.8 kg
Length 1010 mm 1010 mm
Barrel length 450 mm 450 mm
Magazinecapacity 3 or 10 rounds 3 or 10 rounds

 

The SL-6 and SL-7 rifles were developed by German company Heckler & Koch during early 1980s as a para-military weapons for training reservists and possibly arming police. Those rifles, which differed only in calibers / ammunition used (5.56mm for SL-6 and 7.62mm for SL-7) were based on hunting rifles from the same company, the HK 660 and HK 770 respectively, sharing same roller-delayed blowback action and general layout, but featuring shorter barrels andmilitary-type sights and furniture (sling swivels, steel buttplatesetc). Due to high price and German gun laws limitations, overallproduction of SL-6 and SL-7 rifles was limited and now those weapons are collector's items.

The HK SL-6 and SL-7 rifles use roller-delayed blowback action, similar to that used in HK G3 rifle. Chamber is fluted to assist extraction. The cocking handle is located on the right side of the receiver (as opposed to HK G3),and folds forward when not in use. Manual safety is located on the left side of the stock, above and in the front of the trigger. Feed is from proprietary detachable box magazines, holding 3 (flush-fit) or 10(extended) rounds. Stock is made of wood, with additional wooden handguard (ventilated on SL-7) and steel buttplate. Standard sights include hooded front post on the barrel and drum-type diopter sight(similar to that used on HK G3),with settings from 100 to 400 meters in 100-meter increments. Receiveris fitted with mounting points for proprietary HK scope mounts.