In this video, Andrew goes over and reviews the Beuchat Mundial Competition Speargun. 

The Competition is a bare bones entry level speargun. It has a closed muzzle, a 6.5mm notched shaft, and comes rigged with a threaded 16mm band with a metal articulated wishbone, and 2mm braided line rigged straight to the  muzzle. The aluminum barrel has no rail, as is standard with most entry level guns, however it does have a support closer to the back of the gun, to give the shaft a bit of guidance. The trigger mechanism is plastic. Overall a super basic gun, and a great choice for anyone who's just starting out and is looking for a speargun that won't break the bank.