The tight fit between upper and lower receivers is caused by a spring-loaded ball bearing inside the front and rear takedown pins.

The tight fit between upper and lower receivers is caused by a spring-loaded ball bearing inside the front and rear takedown pins.

The tight fit between upper and lower receivers is caused by a spring-loaded ball bearing inside the front and rear takedown pins.

The tight fit between upper and lower receivers is caused by a spring-loaded ball bearing inside the front and rear takedown pins.

Leave a Reply

Your email address will not be published. Required fields are marked *