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/* No Indents Grid
======================================*/
.no-indents > [class*='col-'] {
    padding-right:0;
    padding-left:0;
  
  .img-responsive {
    min-width: 100%;
  }
}

<!-- No indents grid -->
<div class="container-fluid">
  <div class="row no-indents">
    
    <div class="col-lg-4 col-md-6">
      <a href="#">
        <img src="http://placehold.it/400x200" class="img-responsive" alt="" />
      </a>
    </div>
    
    <div class="col-lg-4 col-md-6">
      <a href="#">
        <img src="http://placehold.it/400x200" class="img-responsive" alt="" />
      </a>
    </div>
    
    <div class="col-lg-4 col-md-6">
      <a href="#">
        <img src="http://placehold.it/400x200" class="img-responsive" alt="" />
      </a>
    </div>
    
    <div class="col-lg-4 col-md-6">
      <a href="#">
        <img src="http://placehold.it/400x200" class="img-responsive" alt="" />
      </a>
    </div>
    
    <div class="col-lg-4 col-md-6">
      <a href="#">
        <img src="http://placehold.it/400x200" class="img-responsive" alt="" />
      </a>
    </div>
    
    <div class="col-lg-4 col-md-6">
      <a href="#">
        <img src="http://placehold.it/400x200" class="img-responsive" alt="" />
      </a>
    </div>
    
  </div>
  <!-- /.row.no-indents -->
</div>
<!-- /.container-fluid -->