Custom Pre-Ban HK 91 .308 Win. 18” Semi-Auto Rifle & Extras, MFD 1980
SOLD FOR: $3,500.00
LSB#: LSB260224PC003
Make: Heckler & Koch, Germany
Model: HK91
Serial Number: A024139
Year of Manufacture: 1980 / Modern
Caliber: .308 Win. / 7.62x51mm NATO
Action Type: Semi-Automatic, roller delay blowback operated rifle fed by detachable magazines.
Markings: The right side of the mag well is marked, “Made In Germany / HK Inc. Arl. Va.22 201”. The left side of the receiver is marked with, “HK 91 A024139 / Cal. .308” and an “IA” date code with an Ulm proof. The trigger housing is marked, “S F”. The forend is marked, “2IA”. The stock is marked, “3HJ”.
Barrel Length: 18”, 19.5” w/ flash hider.
Sights / Optics: The front sight is a hooded post set into the triple frame. The rear sight is a four-position rotating diopter drum fixed to the receiver. There is a lug and mounting points for an optic/rail built into the receiver.
Stock Configuration & Condition: This rifle has a three piece polymer furniture set with a bipod cut handguard with a 3-point sling lug, custom PSG-1 style polymer pistol grip, and modified fixed stock with a sling bar with a cheek riser and extended buttplate. There are faint handling marks throughout. There are no chips or cracks. Overall this furniture set is in about Excellent condition.
Magazine Quantity & Condition: 12x Aluminum 20rd HK magazines in Very Good condition and 2x HK steel 20rd magazines in Very Good condition.
Type of Finish: Black Enamel
Finish Originality: Original
Bore Condition: The chrome bore is bright and the rifling is sharp. There is no erosion in the bore but there is some stubborn fouling throughout. In this writer’s opinion the bore rates 9/10.
Overall Condition: This rifle retains about 98% of its metal finish. There are lightscratches and wear marks throughout align with some rub marks on the receiver from a scope base. The action has light wear. 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. The bolt gap is 14 thousandths.
Box, Paperwork & Accessories: Brass catcher, 2x brass deflector, B-Square scope base, 14 magazines.
Our Assessment: The Heckler and Koch HK91 is the semi-automatic commercial variant of the G3 rifle, a platform that became one of the most widely issued battle rifles of the Cold War. Built around the roller-delayed blowback system, the HK91 utilizes a precisely engineered locking mechanism that delays bolt movement without the need for a gas system, contributing to its reputation for durability and consistent function with full-power cartridges. Imported into the United States prior to the 1989 restrictions, rifles such as this 1980 example are considered pre-ban and represent a period when original German-made HK rifles were available in their factory configuration. Chambered in .308 Winchester or 7.62x51mm NATO, a cartridge introduced in the 1950s and known for its power and versatility, the HK91 delivers performance consistent with its military origins. This example presents in very good overall condition, retaining approximately 98 percent of its original black enamel finish with light scratches and handling marks, along with some rub wear on the receiver from a previously mounted scope base. The chrome-lined bore is bright with sharp rifling and only minor fouling, supporting strong performance potential. The rifle has been configured with a custom polymer furniture set, including a PSG-1 style pistol grip and a modified fixed stock with cheek riser and extended buttplate, offering an enhanced shooting interface. The furniture shows minimal wear and remains in excellent condition. The rifle retains its classic HK sighting system with a hooded front post and rotating diopter rear drum, providing a precise and repeatable sight picture.
This HK91 reflects both its original military-derived design and later customization aimed at improving ergonomics and adaptability. The inclusion of a substantial magazine package, along with accessories such as a brass catcher, brass deflectors, and a B-Square scope base, adds to its overall completeness and utility. With its strong condition, pre-ban status, and enhanced configuration, this rifle stands as a notable example of a platform that continues to be valued for its engineering, performance, and enduring presence in the world of semi-automatic rifles. -R.E.