Alright. You are complaining how your Nerf Maverick won't let the barrel open all the way. What do you do? So you could go out the store and buy a Nerf Strongarm for $8.00 or you could do a simple and easy task called modification (for free).
Step 1: Disassemble the Gun
Just take out all the screws and keep them together.
Step 2: Removing the Barrel and Finding the Tabs
The Maverick has 2 small tabs that keep the barrel from opening all the way. They are shown in the images. To remover the barrel unlatch the barrel supports from the gun.
Step 3: Remove the Tabs and Make It Look Nice
So you need a small saw or a roatarry tool and cut off the tabs. Then file down the edges of what's left. The images are shown in order. You will have to file down the tab on the gun frame.
Step 4: Assemble the Gun
Just put the screws back in and you are done!