From Townhall.com:

According to Grassley’s office, the VA “reports individuals to the gun ban list if an individual merely needs financial assistance managing VA benefits,” keeping them from exercising their Second Amendment rights. (Bolding is mine)

“The National Instant Criminal Background Check System (NICS) is effectively a national gun ban list and placement on the list precludes the ownership and possession of firearms. According to the Congressional Research Service, as of June 1, 2012, 99.3% of all names reported to the NICS list’s “mental defective” category were provided by the Veterans Administration (VA) even though reporting requirements apply to all federal agencies.