Heckler & Koch HK SL770 .308 Semi-Auto Roller Delayed Rifle & 3rd Mag, 1979
SOLD FOR: $1,775.00
LSB#: 241207AA217
Make: Heckler & Koch, Germany
Model: SL770
Serial Number: 03370
Year of Manufacture: 1979
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-SL770”. The barrel is marked, “03370” with a Nitro proof and the date code further down the barrel. The magazine is marked, “.234 .308”.
Barrel Length: 19.5”.
Sights / Optics: The front sight is a raised post set atop a knurled base. The rear sight is a foldable square notch. There is a quick detach scope mount attached to the top of the receiver.
Stock Configuration & Condition: The stock is a single piece checkered wood with a schnabel forend, sling stud, capped semi-pistol grip, monte-carlo stock, sling stud, and serrated plastic buttplate. There are light handling marks throughout. There are no chips or cracks. The checkering is sharp. The LOP is 13 3/4” from the front of the trigger to the back of the buttplate. The stock rates in about Excellent 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 10/10.
Overall Condition: This rifle retains about 98% 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 to Excellent 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.
Our Assessment: The Heckler & Koch SL770 is a rare and finely crafted semi-automatic rifle, built to showcase H&K’s renowned roller-delayed blowback system in a sporting configuration. Chambered in .308 Winchester (7.62x51mm NATO), the SL770 was designed as a civilian counterpart to H&K’s military rifles, offering precision, reliability, and durability in a sleek and elegant package. With its cold hammer-forged barrel, high-quality machining, and smooth cycling action, the SL770 is an outstanding choice for target shooting, hunting, and collectors who appreciate H&K’s engineering excellence. One of the defining features of the SL770 is its roller-delayed action, a time-tested system that reduces felt recoil while ensuring flawless cycling and consistent accuracy. The longer barrel and fine-tuned gas system provide exceptional ballistic performance, making the SL770 a highly accurate rifle, even at extended ranges. The integrated diopter sight and precision-machined receiver further contribute to the rifle’s superior accuracy and target engagement capabilities. Unlike its military counterparts, the SL770 features refined wood furniture, giving it a classic, elegant appearance that blends traditional sporting aesthetics with modern H&K performance.
For collectors and shooting enthusiasts, the H&K SL770 is a rare and highly desirable rifle, known for its limited production, premium craftsmanship, and unique combination of military-grade engineering in a civilian platform. Its roller-delayed action, smooth operation, and exceptional accuracy make it a standout choice for those who value both performance and collectibility. Whether sought after for its historical significance, smooth shooting characteristics, or precision-built design, the SL770 remains a testament to Heckler & Koch’s reputation for quality and innovation in semi-automatic rifles. -R.E.
