That looks like a roll pin. Take a small punch or similar item and with a hammer gently tap it flush. You may even get it flush just using the hammer without a punch. Just be gentle and you'll be ok. Then keep an eye on it.
It's a good idea to clean and lube any new firearm before heading to the range. There is a thick, oily substance used to prevent rust from the factory. It's thick and can prevent the gun from functioning properly. And always make sure it's unloaded before you begin working on it.
It's a good idea to clean and lube any new firearm before heading to the range. There is a thick, oily substance used to prevent rust from the factory. It's thick and can prevent the gun from functioning properly. And always make sure it's unloaded before you begin working on it.