Reply to Thread

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Message: <blockquote data-quote="RickN" data-source="post: 3803530" data-attributes="member: 8854">The problem kind of is the mags, or a should say the mags and certain ammo.  The Promags worked ok with standard 55 grain 5.56 ammo, but I had failures to feed, eject and even fire with some FC 223 55gr ballistic tip.  I got to looking closely and the rounds are a bit to long and drag on the inside of the magazine. While the outside dimensions of the plastic mags are correct, the inside is just a hair smaller due to the thickness of the walls. This causes the nose of the bullet to point down a bit preventing it from feeding correctly. Something tells me using ammo with slightly shorter bullets will solve most of my problems.  I am hoping to get out to the gun club early part of next week when it is cooler and do some more testing with various ammo.</blockquote>