The rifling type and rate of twist are also visible on the outside of the mandrel. Holes are drilled in the solid bars, and the size is always bigger than the size of the future bore.
The mandrels are cut into the desired lengths, and they will in fact be longer in the end. This steel comes to the factory pre-hardened, because once the CHF process is complete, it is inadvisable for the barrel to undergo any further treatments.
M16sĬHF starts with precise raw steel bars called mandrels. CHF was invented in WWII Nazi Germany, because the weapons which the Germans were manufacturing were proving to be too costly, and a different way of forging a barrel had to be made in order for production to continue. The other technique is known as cold hammer forging (CHF). Then, the inside of the barrel is polished and honed, the rifling is added, and different treatments are administered. At the company, machines straighten it – to within a thousandth of an inch, no less – and drill a hole in the bar, making it into a tube. One way is to take a solid bar of cylindrical steel, which goes through a certain treatment and arrives soft. How Are Barrels Made?īarrels are made using a couple of techniques. To paraphrase Boromir in Lord of the Rings: one does not simply replace an AR-15 barrel. Although other parts may be just as crucial and essential, the barrel seems to be the most significant, because it cannot be changed easily. The most important piece of any rifle is the barrel. One does not simply…ĭesigning and creating a firearm like the AR-15? That is an accomplishment. Superman may be faster than a speeding bullet, but all he had to do was show up from Krypton and wear tights.
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