Master Model is known for producing high quality brass armament for aircraft and ship models. This new offering, AM-24-004, Hispano 20mm brass cannon for the AM-24-004, is another fine addition to this line of products.
The Master Model parts replace all four of the 20mm cannons that are included in the Airfix kit. It is necessary to remove and use the breaches from the kit parts but the barrels can be discarded. Assembly is straightforward and documented on the instruction card contained in the Master Model package.
One begins by removing the breach from the original Airfix cannons and by drilling a receiving hole in each breach. The depth and diameter of the receiving hole can be determined by identifying the locating pin on the brass barrel part that butts up against the breach.