Kamen Rider Accel + Gunner A

Kamen Rider Accel gets a new weapon, the Gunner A. It can combine with Accel to form AccelGunner. How do they combine?<br />...<br />...<br />Watch the clip yourself.<br />...<br />...<br /><br />What were the producer and director thinking? LOL<br /><br />Subbed clips are from TV-Nihon