at close range - Phrases/Idioms
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Very nearby, as in At close range, the rock band was unbearably loud. Derived from shooting—range denotes the distance that missile or projectile can be made to travel—this expression soon came to mean anything in close proximity.