Oleh

{'!msProducts' | snippet:[
    'parents' => '5',
    'tpl'=> '@FILE chunks/middle_images.tpl',
    'leftJoin' => '{
        "images" : {
	    "class" : "msProductFile",
	    "on" : "`images`.product_id = msProduct.id AND `images`.type = \'image\' AND `images`.path NOT LIKE \'%x%\'"
	}
    }',
    'select' => '{
         "images" : "GROUP_CONCAT(`images`.`url` SEPARATOR \';\') as `images`"
    }',
]}

{set $imgArr = $images | split: ';'}
{foreach $imgArr  as $fileSrc}
    <img src="{$fileSrc}" srcset="{$fileSrc} 2x">
{/foreach}