Heckler & Koch SL6

Heckler & Koch SL6
Type	Semi-automatic rifle
Place of origin	Germany
Production history
Manufacturer	Heckler & Koch
Produced	1980s-1991
Variants	SL6A2, SL7
Specifications
Weight	7.92 pounds (3.6 kg) unloaded
Length	39.76 in. (1010mm)
Barrel length	17.71 in. (450mm)
Cartridge	.223 Remington, 5.56×45mm NATO
Action	Roller-delayed blowback
Rate of fire	Semi-automatic or Select-fire (Semi, 2-round Burst) (SL6A2)
Feed system	3, 4, or 10-round single column, internal magazine
Sights	Rotary rear aperture drum, hooded foresight

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.^[1]

Design and operation

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.

Replacement

The H&K SL6 is no longer manufactured, having been replaced by the H&K SLB 2000.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.^[2] The H&K SL6A2 variant is essentially the same rifle; however, the SL6A2 includes a flash hider and offers a two-round burst selector.

References

External links

• HK SL6 at HKPro.com
• HK SL6
• HK SL7

Delayed blowback firearms
Lever Delayed	AA-52 Benelli B76 Cristóbal Carbine Danuvia 43M Dlugov FAMAS FN Five-seven FNAB-43 Garanin MAC-58 Sterling 7.62 ST Kinetics CPW TKB-517
Roller Delayed	Calico M960 CEAM Modèle 1950 CETME Ameli CETME rifle CETME Model L HK G3 HK G41 HK MP5 HK P9 HK PSG-1 HK SR9 HK UCP HK21 HK33 HK43 PTR 91F SIG 510 SIG MG 710 SRM Arms Model 1216 StG 45(M)
Gas Delayed	Arsenal P-M02 Grossfuss Sturmgewehr Heckler & Koch P7 M-77B Steyr GB Volkssturmgewehr 1-5 Walther CCP
Hesitation Locked	M50 Reising Remington Model 51 Remington Model 53 Remington R51 SIG MKMS
Flywheel Delayed	Barnitzke machine gun MGD PM-9
Vector Delayed	KRISS Vector