Last week I purchased a new ORF 1919a4 from CDNN of Texas. Today I had the first chance to try it out. Using IMI links and factory Lake City ball ammo the weapon will not feed. It seems to want to jam up in the feed way area sometimes it will chamber a single round but will not advance to a second one. This is my first belt feed weapon. Is it possible to load the links wrong? I linked up about 20 rounds by hand. Also the top cover latch was nearly impossible to move without using a small hammer and a block of wood to loosen it up. And it takes a lot of pressure pulling to the ejection side of the weapon to get the top cover closed. I hope these problems are user error as the gun is fresh out of the box. Any info would be appreciated. Thanks