Demro Products XF-7 “Wasp” 9mm 17″ Semi-Automatic Carbine Open Bolt
SOLD FOR: $1,277.00
LSB#: LSB250829RS008
Make: Demro Products, Inc.
Model: XF-7 “Wasp”
Serial Number: 050778
Year of Manufacture: 1970s–1980s / Modern
Caliber: 9mm
Action Type: Semi-Automatic, Delayed-Blowback, Magazine Fed, Open Bolt
Barrel Length: Approximately 17″
Sights / Optics: The front sight is a fixed blade dovetail to the vented muzzle. The rear sight is a fixed U/peep-notch assembly mounted to the receiver.
Stock Configuration & Condition: The buttstock is one-piece walnut with a straight comb and serrated metal buttplate. The forend is a black stained wood handguard fitted over the finned barrel. The wood shows scattered scratches and handling marks but no cracks. The forend shows surface wear from age and use. The LOP measures 14 7/8″ from the front of the trigger to the back of the buttplate. Overall, the stocks rate in Good condition.
Magazine Quantity & Condition: None.
Type of Finish: Blued
Finish Originality: Original
Bore Condition: The bore is bright and the rifling is defined. There is light erosion throughout. In this writer’s opinion the bore rates 6/10.
Overall Condition: This rifle retains approximately 50% of its original finish. There is finish wear throughout the upper assembly, scattered oxidation, and thinning on high points. The markings are clear. The stock shows moderate handling marks. Screws and pins show light tool marks but remain serviceable. Overall, this carbine rates in Good condition.
Mechanics: The action cycles and the safety selector functions properly. We did not fire this firearm. As with all used firearms, a thorough cleaning may be necessary to meet your maintenance requirements.
Box, Paperwork & Accessories: None.
Our Assessment: Born from the lineage of the Fox Carbine and produced in limited numbers by Demro Products in Connecticut, the XF-7 “Wasp” stands as one of the more intriguing American pistol-caliber carbines of the late 20th century. Its appearance is unmistakable: a stamped-steel receiver mated to a walnut buttstock, a polymer forend, and a full-profile finned barrel evocative of the Thompson submachine gun’s cooling system. These features combine to create a carbine that feels both rugged and experimental—an artifact of an era when small U.S. manufacturers actively explored compact, duty-oriented PCC designs.
Configured here in 9mm with its approximately 17″ finned barrel, this example exhibits the model’s signature details, including its vented muzzle housing and the characteristic “THINK” reminder painted across the rear sight base. While showing exterior finish wear consistent with age and handling, the bore remains strong and the action remains functional, making this an uncommon and compelling representative of Demro’s short-lived but distinctive production. Surviving Wasps appear only sporadically on the collector market, and complete examples like this allow enthusiasts to appreciate a uniquely American approach to PCC engineering during the 1970s–1980s. Please see our photos and good luck on your bid! – L.S.
