Hi Guys! I have come up against this issue which I have never experienced before and that is whilst changing out the furniture from Tactical to wood the Underside front foregrip retaining bracket will NOT move forward to allow the wooden fore grip to be inserted even though I have pushed the lever forward . I have changed out furniture many many times and am totally stumped I have tried PB Blaster to see if I could unfreeze something. Help needed!....Thanks in Advance.