The deadly arsenal of weapons found in the 32nd-floor room of the Las Vegas Mandalay Bay Hotel included 16 assault rifles, 12 of which had been modified from semi-automatic to fire in automatic mode.

The guns included an AR-15 and an AK-47 as well as four Daniel Defense DDM4 rifles, three FN-15s and other rifles made by Sig Sauer.

The bump-fire stock increases the rate of fire but can wear out the mechanics of a gun, snapping the firing pin that was designed only for semi-automatic fire.

This may go some way to explaining why the killer had so many guns with him.

In a country increasingly infamous for its gun-related killings, this horrific incident – whether “lone wolf” or not – casts an unflattering light on the gun culture of America at large and the control laws as enforced by the state of Nevada in particular, it having some of the laxest security checks and balances in place for ownership of such deadly weaponry.

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