So I'm interested in changing the stock , pistol grip , and hand guard. I tried to use the gas tube lever and its impossible to move. Then I realized the handguards are held together by hex screws, lacking a hex key I didn't attempt to do anything but it appears that they may be stripped. So my question is 1. Any ideas on why the lever is almost impossible to move? 2. If the latch wont move, even if I manage to remove the handguards would I be able to put a traditional handguard on or should I give up hope and keep the rail on? 3. If the hex keys are stripped how would I get the handguards off?