The subject of forward latching spearguns on the "pistonless" speargun thread (http://forums.deeperblue.com/pneumatic-spearguns/94538-pneumatic-speargun-without-piston.html) has prompted me to put some photos up of a "РПБ-1М" speargun from Russia. I purchased this gun in 1999 from the USA (it was serial numbered and engraved as being manufactured in 1992) where it was then being sold as the "Prizm", although this one is the longer model at 765 mm overall length from speartip to butt when cocked to shoot. The gun has 6 meters (as supplied!) of line on it and is claimed to kill at 5 meters, but is wildly inaccurate. The basic components are well made, but let down by sloppy machining work in critical areas as the muzzle is not in-line with the inner barrel bore when assembled, in fact the muzzle tilts upwards at a slight angle. That is a big problem as the muzzle is both the shaft guide and sear box and after three dives with the gun I gave up on it as the spear routinely flew over the top of the intended targets by a large margin. I finally hit a flounder in the head by aiming a foot or so behind its tail! It took three shots to find the correct aiming point off-set and the plucky flounder stood its ground until the third one hit it. Natural selection at work!
The line slide uses a cord loop to stop it coming off the spear tail, however the shooting line stretches significantly when wet and the line slide can pull off the "nude" tail with interesting results, especially if the dangling line loop has caught up on the line anchor during the shot. Although not as accurate(!!) without the line slide-stabilizer with three fins fitted you can shoot the gun as a front tied spear. Now you know why Russians were into building their own spearguns when this was the only sort of production speargun that you could commonly buy in the shops. If the muzzle connecting threads had been cut straight then it would have been a useful gun and no doubt some of them were better made, in fact a variant is still being manufactured today. The annular groove in the front of the spear shaft weakens it, but if you look at the tiny floppers on the speartip the gun was mainly used on smaller fish, if you could hit one at other than point blank range! A trident improved your chances over the single point tips and was probably a desirable accessory for hunting on the river or lake bottoms.
The line slide uses a cord loop to stop it coming off the spear tail, however the shooting line stretches significantly when wet and the line slide can pull off the "nude" tail with interesting results, especially if the dangling line loop has caught up on the line anchor during the shot. Although not as accurate(!!) without the line slide-stabilizer with three fins fitted you can shoot the gun as a front tied spear. Now you know why Russians were into building their own spearguns when this was the only sort of production speargun that you could commonly buy in the shops. If the muzzle connecting threads had been cut straight then it would have been a useful gun and no doubt some of them were better made, in fact a variant is still being manufactured today. The annular groove in the front of the spear shaft weakens it, but if you look at the tiny floppers on the speartip the gun was mainly used on smaller fish, if you could hit one at other than point blank range! A trident improved your chances over the single point tips and was probably a desirable accessory for hunting on the river or lake bottoms.
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