Another speargun from Russia that may be of passing interest to forum members is the "Shark", which appears to be a pneumatic speargun along the lines of the Mares "Cyrano". It too has an 11 mm ID inner barrel and a rear handle position with a line release pivoting out one side of the lower trigger finger guard frame, but the gun does not have the characteristic "Cyrano" snout (no great loss!). Thus the "Shark" is probably more like the "Spark" or "Stealth" (now "Sten 11").
Internally the trigger mechanism is much the same as is used in the Mares guns, but there are some very significant differences in the internal construction of the "Shark".
The rear handle is composed of five plastic pieces, the upper cylindrical "receiver" or body section is a two-piece clamshell moulding, as is the lower grip handle, with a trigger finger guard frame carrying sub-section which holds the trigger pivot pin and the safety switch forming the bridging section located between them. These plastic moulded parts are held together with screws or bolts. The actual rear pressure bulkhead is a stepped aluminium cylindrical sub-section that sits inside the upper plastic body as its clamshell construction prevents it from acting as a pressurized component. In a Mares gun this is all accomplished with one large plastic moulding that can withstand high pressure, although since the "Cyrano" and the "Sten 2001" model the lower grip section is a separate moulding that slides over a hollow column integral with the upper section or receiver on the Mares guns.
Other design departures are a polyurethane bush on the piston nose working as a combined shock absorber and spear tail gripper, which is basically the same spear coupling system as is used on the "Seabear" or "Pirometer", the balance of the piston being made of metal and carrying two "O" rings with a large gap between them to stop the piston rocking in the barrel bore. As with the "Seabear" the spear can be clipped for transport into clamps located at the muzzle and just in front on the rear handle. Earlier "Seabear" guns had both clamps positioned on the rear tank, but later ones used a combined sight and line wrap hook to provide the front spear clamp.
The "Shark" appears to be a sinker, however the gun has been revised since this first version appeared and there may have been changes made since which have made it lighter. However in this original configuration the extra internal components and screw fasteners are adding bulk as the nose cone appears to be the only pressure-resistant plastic element here.
This photo of the "Shark" is rather small, but serves to show some stylistic similarity to the Mares rear handle pneumatic spearguns.
A gun can be seen being methodically dismantled here by "Skarabey": http://apox.ru/forum/topic/7363-razborkasborka-ruzhja-akula/
Internally the trigger mechanism is much the same as is used in the Mares guns, but there are some very significant differences in the internal construction of the "Shark".
The rear handle is composed of five plastic pieces, the upper cylindrical "receiver" or body section is a two-piece clamshell moulding, as is the lower grip handle, with a trigger finger guard frame carrying sub-section which holds the trigger pivot pin and the safety switch forming the bridging section located between them. These plastic moulded parts are held together with screws or bolts. The actual rear pressure bulkhead is a stepped aluminium cylindrical sub-section that sits inside the upper plastic body as its clamshell construction prevents it from acting as a pressurized component. In a Mares gun this is all accomplished with one large plastic moulding that can withstand high pressure, although since the "Cyrano" and the "Sten 2001" model the lower grip section is a separate moulding that slides over a hollow column integral with the upper section or receiver on the Mares guns.
Other design departures are a polyurethane bush on the piston nose working as a combined shock absorber and spear tail gripper, which is basically the same spear coupling system as is used on the "Seabear" or "Pirometer", the balance of the piston being made of metal and carrying two "O" rings with a large gap between them to stop the piston rocking in the barrel bore. As with the "Seabear" the spear can be clipped for transport into clamps located at the muzzle and just in front on the rear handle. Earlier "Seabear" guns had both clamps positioned on the rear tank, but later ones used a combined sight and line wrap hook to provide the front spear clamp.
The "Shark" appears to be a sinker, however the gun has been revised since this first version appeared and there may have been changes made since which have made it lighter. However in this original configuration the extra internal components and screw fasteners are adding bulk as the nose cone appears to be the only pressure-resistant plastic element here.
This photo of the "Shark" is rather small, but serves to show some stylistic similarity to the Mares rear handle pneumatic spearguns.
A gun can be seen being methodically dismantled here by "Skarabey": http://apox.ru/forum/topic/7363-razborkasborka-ruzhja-akula/
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