While SEALs are the most well-known amongst the U.S. Navy‘s Spec Op units, the Special Warfare Combatant-Craft Crewmen program (SWCC) takes it to a different level.

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“Swicks,” as its pronounced, are referred to as the “best-kept secret in the U.S. Navy.”

The SWCC program lasts 37 weeks. The training results in a 60 to 65 percent attrition rate. In total, there are only 800 Special Warfare Combatant-craft Crewmen in the entire Navy.

Training on the GAU-17 Miniguns

The U.S. Navy recently released a SWCC training video. It features plenty of hand-to-hand combat and physical fitness training. But it also features a real treat: GAU-17 miniguns.

Aboard a Special Operations Craft-Riverine (SOC-R), SWCC trainees are shown firing the miniguns, along with several other machine guns, at a rapid pace.

Watch the entire video above.

For more information about the SWCC, please visit Navy.com.