British Sten MK2 parts kit w/BARREL, tube, good trunnion,mag,9mm WWII icon!

What is the British Sten MK2 parts kit w/BARREL, tube, good trunnion,mag,9mm WWII icon!  and why does it matter to collectors?

The British Sten MK2 parts kit w/BARREL, tube, good trunnion,mag,9mm WWII icon! was the standard British submachine gun from 1942 onward. Over two million were made. Also, it was parachuted to resistance fighters across occupied Europe. So it is not just a British gun — it is a piece of Allied history. First produced from simple steel stampings to meet wartime demand. Therefore, it represents one of the most important small arms designs of the 20th century. Finally, complete kits with original parts are becoming increasingly hard to source.

What parts are included in this kit?

This kit includes the barrel, receiver tube, trunnion, and magazine. That is a strong package. First, the trunnion is described as good condition — that matters for a functional build. Next, the barrel and tube are original WWII-era components. Also, the magazine is included, which is often sold separately elsewhere. However, no registered receiver means this is not a complete firearm. So you are getting genuine wartime parts, not a gun.

What calibre is the Sten MK2 — and is 9mm ammo easy to find?

The Sten MK2 fires 9mm Parabellum — also written 9×19mm. So yes, ammo is everywhere. It is the most common pistol calibre in the world. Also, 9mm is used by NATO, police forces, and civilian shooters globally. Therefore, running a Sten-based build is practical from an ammunition standpoint. But always verify headspace and barrel condition before live fire on any surplus parts build.

Is this kit good for a semi-auto Sten build or display only?

Both depending on your jurisdiction and intentions. First, for display or historical collection, this kit is excellent. The parts are original and the trunnion condition is rated good. Next, for a semi-auto build, you need a legal registered receiver and compliance with your local firearms laws. Also, Sten semi-auto builds have been done successfully by qualified gunsmiths. However, the Sten design is simple — but a build still requires correct headspacing and timing. Therefore, always use a qualified smith for any functional build.

Is £700 the right price for a complete Sten MK2 parts kit?

Yes for a kit that includes barrel, tube, trunnion, and mag together. Here is why. First, British Sten MK2 parts kit w/BARREL, tube, good trunnion,mag,9mm WWII icon! with all four components are not common finds. Next, a good condition trunnion alone has value — it is a critical structural part. Also, original WWII British parts with documented provenance attract serious collector interest. But condition matters. Therefore, inspect the listing photos carefully. Finally, for a collector or builder, £700 for a complete kit with a good trunnion is fair money.

Frequently asked questions

What calibre does the Sten MK2 fire?

9mm Parabellum (9×19mm). It is the same round used in most modern pistols and SMGs. So ammunition is widely available and inexpensive for range use or testing.

What is the trunnion on a Sten — and why does its condition matter?

The trunnion is the front end cap of the receiver. It holds the barrel and absorbs bolt impact during firing. A good condition trunnion is essential for a safe, functional build. A cracked or worn trunnion makes a build unsafe.

Can I legally build a semi-auto Sten from a parts kit in the UK?

This is a complex legal area in the UK. Section 5 firearms laws cover submachine gun designs. You must consult a firearms solicitor and the Home Office before attempting any build. Do not proceed without legal advice.

How many Sten MK2s were made during WWII?

Over two million Sten MK2s were produced between 1942 and the end of the war. They were made across multiple British factories and by resistance groups in occupied Europe who copied the design.

What magazines does the Sten MK2 use?

The Sten uses a 32-round single-stack 9mm magazine that feeds from the left side horizontally. The mag included in this kit is original. Reproduction Sten magazines are also available if you need spares.

What is the difference between the Sten MK1, MK2, and MK3?

The MK1 was the first version — more complex with a flash hider. The MK2 was the most produced — simplified, lighter, and the definitive wartime version. The MK3 was even simpler with a fixed barrel and was made faster and cheaper. Parts are not all interchangeable between marks.

Is the receiver tube in this kit the registered or serialised component?

In most jurisdictions the receiver tube — or the lower receiver equivalent — is the regulated firearm component. On a demilled parts kit the tube will be cut or otherwise rendered inactive. Verify the legal status of the tube with eurogunandpartshub and your local firearms authority before purchase.