I have two crossbow pistols now, the PSE viper ss 50lb rated at 215fps and the Cobra 80lb crossbow pistol rated at 160fps.
They are both 20” long and 17” wide bow tip to tip uncocked and have identical 6” power strokes. The Viper ss is made mostly of a carbon/plastic material with a only few metal parts and is very light weight, the Cobra is all metal mostly aluminum is about twice as heavy as the viper and the only plastic parts on it are the 11mm dovetail rail, pistol grips and trigger.
Positives.
The Viper is really light weight, has a superior safety/anti dry fire, string catch and release which will make you’re string servings last much longer, 2x 20mm picitany rails and finger guards.
The Cobra is more accurate, penetrates more and is easier to cock even having a heavier 80lb bow on it.
Negatives.
The viper makes more noise ( twwaaanggg ) when fired, only moderately accurate, harder to cock even at only a 50lb bow and worst of all the top 20mm picitany rail has a steep downward slope to it, so steep I could not use a red dot scope on it, I could not raise the dot up high enough to zero the scope and had to remove the red dot and go back to the open sights. ( I did put a laser on the bottom 20mm picitany rail and could zero that just fine but it did not improve accuracy. )
The Cobra has a weak 11mm dovetail rail, lousy safety system only locking the trigger ( no anti dry fire and can misfire if bumped just right ) and is hard on string servings with the grav drop string catch system.
So if you’re just looking for some twang and bang fun and don’t want to worry about serving repair or hitting the bull’s eye all the time, the viper is a good buy but If you want something that’s really accurate and hits good and hard the Cobra is the way to go, just buy a cheap serving tool and some 100lb test twisted Kevlar kite string to reserve it with. I get 500+ rounds from the Kevlar servings just keep the rail greased and you can learn to serve a bow string in 10 mins on YouTube.
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