Heckler & Koch HK SL7 .308 Semi-Auto Roller Delayed Rifle W/ 3rd Mag, 1984
SOLD FOR: $1,787.00
LSB#: 241207AA223
Make: Heckler & Koch, Germany
Model: SL7
Serial Number: 15825
Year of Manufacture: 1984
Caliber: .308 / 7.62X51
Action Type: Roller Delayed Blowback, Semi-Automatic Fed By Detachable Magazines
Markings: The left side of the receiver is marked, “HK CHANTILLY VA / HECKLER & KOCH GMBH OBERNDORF/ N MADE IN W GERMANY / Mod. HK-SL7”. The barrel is marked, “15825” with a Nitro proof and the date code further down under the handguard. The magazine is marked, “.234 .308”.
Barrel Length: 16.5”.
Sights / Optics: The front sight is a hooded post. The rear sight is a rotating drum adjustable diopter sight marked out to 4. The top of the receiver has tapped holes and scope mount lugs.
Stock Configuration & Condition: The stock is a two piece wood set with a forend cap/sling loop, vented top handguard, semi-pistol grip, straight comb, sling bar/well, and steel buttplate. There are pressure dents, scratches, nicks, and scuffs throughout. The gloss finish has chipping, there are no cracks. The LOP is 13 3/4” from the front of the trigger to the back of the buttplate. The stock rates in about Good overall condition.
Magazine Quantity & Condition: One x 3rd original magazine in Excellent condition.
Type of Finish: Blued.
Finish Originality: Original
Bore Condition: The chrome lined bore is very bright and the polygonal rifling is unworn. There is no erosion in the bore but there is some light stubborn fouling. In this writer’s opinion the bore rates at a 9.5/10.
Overall Condition: This rifle retains about 95% of its metal finish. There is light operation wear. There are light scratches and small nicks throughout with some rub marks around the scope mounts. The barrel extension has turned to a deep plum color. The screw heads are sharp and the pins are unmarred. The markings are clear. Overall, this rifle rates in about Very Good condition.
Mechanics: The action functions correctly. We did not fire this rifle. As with all used firearms, a thorough cleaning may be necessary to meet your maintenance requirements.
Box, Paperwork & Accessories: One magazine, original leather sling.
Our Assessment: The Heckler & Koch HK SL7 is a semi-automatic sporting rifle chambered in .308 Winchester (7.62x51mm NATO) and designed in the 1980s. It was aimed at the civilian and law enforcement markets and is noted for its unique, streamlined design and reliable G3-style roller-delayed blowback action, a hallmark of Heckler & Koch’s engineering. The SL7 is often appreciated for its combination of precision, durability, and ergonomic features, making it a popular choice among collectors and shooting enthusiasts alike. One of the SL7’s key features is its roller-delayed blowback system, a simplified version of the system used in HK’s battle rifles, like the G3. This mechanism allows for smooth, controlled cycling and reliability across a range of environmental conditions. Unlike gas-operated rifles, the SL7’s system does not require an external gas source to cycle, making it inherently simpler and less prone to fouling from gas residue. This roller-delayed action, combined with the .308 caliber, results in a rifle with minimal recoil, allowing for quick follow-up shots and a generally pleasant shooting experience. Although the SL7 is chambered in .308 Winchester, which gives it respectable stopping power and range, it is primarily intended for sporting or target use rather than heavy tactical applications. The .308 round provides good ballistic performance, making it effective for both medium-range target shooting and hunting.
Production of the HK SL7 was eventually discontinued in 1991, making it a rare and collectible rifle today. The SL7’s blend of innovative mechanics, unique design, and reliable performance make it a sought-after firearm for those interested in Heckler & Koch’s history and the evolution of sporting rifles. Its rugged build, roller-delayed blowback action, and .308 chambering are testaments to the brand’s dedication to quality and functionality in civilian rifles. -R.E.
