Joseph Lynch’s (Brendan Gleeson) hero guillotine gun from Justin Kurzel's 2016 video game adaptation Assassin's Creed.

Convicted Callum Lynch (Michael Fassbender) explores the memories of his ancestor Aguilar de Nerha and gains the skills of a Master Assassin with the Sevilla Brotherhood before he does battle against the secret Templar order.

The guillotine gun was displayed in the window of Alan Rikkin’s (Jeremy Irons) office where he talks to Dr Sophie Rikkin (Marion Cottilard). It also appears in several deleted scenes, both in a display case and wielded by Joseph. Made from metal and wood, the gun has a realistic weight and heft. The wooden stock features solid metal wrapping at the butt end. At the stock’s midpoint is a large, ornate metal firing mechanism and elongated trigger area. A plate inscribed with ‘lamufactures Smr Etiemne’ is fixed to the right of the stock, while on the left a second plate has been inscribed with the replica maker’s insignia: ‘Denix – Made in Spain: 260’. This could indicate that this was number 260 in a set of similar weapons made for production.

The barrel is made of metal and mounted within the stock, so that it begins halfway up the gun. The end of the barrel is metal and features a wide opening. Down either side run intricately-detailed panels complete with filigreed engraving and the words ‘ANNO 1672’. A large ornate axe head extends beneath the muzzle, embossed with rich filigree on both sides. Above this, the prominent rear spike doubles as a sight – this too features filigree work.

The violent crime reduction bill means that this particular prop can only be sold to customers who reside outside the UK. Generally speaking, it is illegal for a resident of the UK to buy this item.