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| Science & Technology |
| HK 121 - General Purpose Machine Gun |
| 2015-12-23 |
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| Posted by:Besoeker |
| #3 Well they could have done the Hughes Chain gun treatment or one of the variations of that on the barrel. A gun drill bore prior to heat treat then heat treat to extreme hardness and then grind bore to final size then etch the rifling in. |
| Posted by: Chaith Oppressor of the Lutherans1517 2015-12-23 19:53 |
| #2 No real reason to think the same barrel is used on the second belt. It's a vendor video. |
| Posted by: Skidmark 2015-12-23 11:22 |
| #1 I assume there is something about the heat treatment of the barrel that prevents cracking when quenched with plain water. |
| Posted by: badanov 2015-12-23 00:13 |