Bootstrap 3 grid with no gap

Another option would be to create your own special CSS class for whenever you want to apply the “gutterless” columns..

HTML

<div class="container">
    <div class="row no-gutter">
        <div class="col-6 col-sm-6 col-lg-6">Col 1</div>
        <div class="col-6 col-sm-6 col-lg-6">Col 2</div>
    </div>
</div>

CSS

.no-gutter [class*="-6"] {
    padding-left:0;
}

Demo: http://bootply.com/73960