Hello everyone. I have just recently purchased this great gun but am having difficulties reassembling the stock. The stock gets hung up at a certain point and wont push in any further. I tried all I can think of. I removed the bolt to show pictures of what's going. It looks like the plastic little lip things that slide in at the very tip of the stock middle piece has some wear on it. It's kinda hard to see but it's on the last picture. Is my stock crooked and not allowing it slide in and does it need to be sent back to be fixed? Or has anyone else had this issue and know what I'm doing wrong or have a fix?