okay,,remove the magazine cap,,remove the barrel,,twist off the ugly black fake mag extension,,theres gonna be magazine spring cap at the end of your short stock tube,,,,remove it,,watch out for the spring fling,,screw on your new extension,,use the same spring,,put the rest back together,,except for that silly magazine spring cap retainer that you found when you removed the fakkie,,by doing this and just using your magazine cap as the end for the spring to rest,,you can have 7 round tube capacity,,+1+1=9 total,,you'll love it,,that M1014 will soak 100 rounds like nothing flat,,---------peace man M1014