CATCO STEN Mk II 9mm Fully Transferable Machine Gun, Open-Bolt, Quick-Change 7.75 in Barrel, 5 Magazines
This fully transferable CATCO STEN Mk II is a U.S.-made, open-bolt 9mm machine gun built on a CATCO tube receiver and assembled from surplus STEN Mk II parts. It features a rotating magazine housing, a quick-change 7.75 inch barrel with a perforated barrel nut stamped "J.101," and a selector marked "R" for semi-automatic and "A" for automatic. Receiver markings include "CATCO – WASCO CA" alongside "STEN MK 2"/"STEN.MK II," with small proof and inspection stamps visible.
Condition
Overall Condition: Poor condition.
Bore Overall Condition: Poor - Noticeable dirt, stains, significant corrosion or damage.
Bore Rifling: Poor Rifling - Rifling heavily worn or filled with fouling or debris.
Specific Condition Notes: This firearm is completely disassembled. The bolt is missing the extractor. The extractor must be replaced by a qualified gunsmith prior to any attempt to fire. This is a gunsmith special and is sold as is.
What's Included
- Receiver (CATCO tube receiver marked "CATCO – WASCO CA" and "STEN MK 2"/"STEN.MK II")
- Barrel, quick-change 7.75 in, with perforated barrel nut stamped "J.101"
- Stock, detachable skeleton wire (steel)
- Bolt assembly (non-matching; missing extractor)
- Bolt handle
- Recoil spring
- 5x 32-round STEN-pattern steel box magazines
- Khaki canvas web sling
This STEN Mk II is configured for side-feeding STEN-pattern magazines and uses simple open-bolt blowback operation. The selector is marked "R" and "A" for semi-automatic and automatic fire. Capacity is listed at 32+1 with the included 32-round magazines.
The receiver is U.S.-made and clearly marked "CATCO – WASCO CA," with model markings "STEN MK 2"/"STEN.MK II." It was assembled from surplus STEN Mk II components on a CATCO tube receiver, and small proof/inspection stamps are visible on the parts. The rotating magazine housing is present, along with the front sight ring base.
The barrel measures 7.75 inches and uses a quick-change system secured by a perforated barrel nut stamped "J.101." The steel construction continues through the receiver and stock, with a detachable skeleton wire stock providing a listed 13.0 inch length of pull.
Included with the gun are five 32-round STEN-pattern steel box magazines and a khaki canvas web sling. The bolt assembly bears a non-matching number and, as noted, lacks an extractor. All listed major components are present as detailed in the parts list.