Investment Casting Applied to Firearm Parts Manufacturing

Investment casting is an industrial process that we have already covered in two previous articles. Applied to the firearms industry and other fields, this process makes it possible to produce near-net-shape blanks and reduce manufacturing time.

You can find these articles by clicking on the links below:

• • The Charter Arms Undercover revolver: Another Path to Simplification ;
  • The AMT Backup II Pistol in .380 ACP.

Given the widespread use of investment casting in the firearms industry, it is important to take a closer look at what this process actually involves and the steps leading from the wax pattern to the “finished part.” I put “finished part” in quotation marks because a finished investment-cast part is actually a casting blank delivered to the firearm manufacturer to undergo various secondary operations in order to obtain ready-to-use components.

Here is a video in French explaining the basic principles of investment casting. Source: YouTube – Génie Civil (Art & Techniques).

Through a second clip, you will see the steps involved in manufacturing a Colt 1911-style pistol frame casting blank (at the manufacturer Maximus Arms) using investment casting.

Although the film is in English, the successive stages are very easy to follow. Watching the first video beforehand will make it even easier to understand.

The final machining operations following the casting blank stage, however, remain confidential.

To watch the original video:

Source: How a Maximus Arms 1911 is made / YouTube Channel: Talking Lead
Link: youtube.com