On the “Vlanik” pistonless gun thread there was an image of two guns that looked very attractive and a search has discovered them on the www.akvalang.com website. The top gun is a 70 cm model and the lower gun is a 55 cm model. The 70 cm gun has a side-mounted line release while the 50 cm gun has a passive magnetic clip similar to the Pelengas release lever.
Roman (Adept6), who lives in Belarus, has described the guns there, but unless you are a member you cannot see the photos and so I am reposting some of them here. The guns were created by Roman who also did the “Arma” speargun, hence the similarity in the style of the grip handle.
Here are photos of the muzzle and spears used with the guns.
The grip handle and barrel which has an integral shroud incorporated for buoyancy on a 22 mm diameter tank tube. Note that the trigger pivot pin is in the lower trigger finger guard frame.
The plastic trigger operates the sear lever arm in the muzzle, which is basically a single piece trigger, via a slim pull rod that runs under the tank tube to the muzzle. Note the step in the front of the spears for the sear tooth (which is of a cam type) to engage rather than an annular notch.
The longer 70 cm gun floats after the shot, the shorter 50 cm gun is a slight sinker. A side-mounted line release is incorporated in the former gun, the latter uses a passive magnet line clip located just behind the grip handle.