#PortedBarrels

Desert Design and Development has a line of integrally suppressed ARs and a domestic HKMP5SD clone. Like the MP5SD, both the AR pattern rifles and D3LLC’s HK clone have ported barrels that slow supersonic ammunition below the speed of sound to prevent supersonic crack.

This picture shows factory ported Glock pistols. The two most common are the C model pistols which you can see int he photo above as the one on the bottom. The other two are somewhat uncommon. The Glock on the top is a Gen 1 Glock 17L with an optional factory three port barrel. The middle Glock is a Gen 3 Glock 24C with 4 ported barrel. Somewhat similar to the Glock 18C porting like this one below.