handofzeus
CGN Ultra frequent flyer
- Location
- Trout Creekish Ontario.
I've apparently talked myself into a bullpup style shotgun because the rifles are ridiculously priced. After poring over many articles and videos I noticed something. Almost all the models that I had looked at were basically typical semi-auto actions mounted in a chassis EXCEPT for a small handful that are all, no doubt, the same Turkish company rebranded for different distributors. We all know the typical gas system with the bleed port through the barrel wall and into a ring or underlug giving the appearance of two stacked tubes when viewed from the side. Barrel on top of magazine tube and magazine tube doing double duty as carrier for the gas piston. On the models in question I first noticed that the fore ends were much slimmer than most which led me to find out why.
It turns out that on bullpups like the NK-1 the barrel acts as the guide for the piston. I know that many artillery pieces use this method but I've never noticed it on a shotgun. Since the gun is mag fed to begin with there is no need for a mag tube so this makes perfect sense by getting rid of superfluous parts. The gas exits barrel ports and vents directly to the piston which travels back down the length of the barrel compressing a recoil spring.....no lug, no tube. My only question is whether this system inherently runs hotter due to the hot gases being momentarily trapped between the piston and outer barrel wall. This also leads to another point. If your barrel gets bulged along the operating length of the piston travel will it still cycle?!
It turns out that on bullpups like the NK-1 the barrel acts as the guide for the piston. I know that many artillery pieces use this method but I've never noticed it on a shotgun. Since the gun is mag fed to begin with there is no need for a mag tube so this makes perfect sense by getting rid of superfluous parts. The gas exits barrel ports and vents directly to the piston which travels back down the length of the barrel compressing a recoil spring.....no lug, no tube. My only question is whether this system inherently runs hotter due to the hot gases being momentarily trapped between the piston and outer barrel wall. This also leads to another point. If your barrel gets bulged along the operating length of the piston travel will it still cycle?!
At first I thought the annular barrel setup was pretty cool because it got rid of unnecessary parts but now I'm thinking the traditional separate piston ring setup might be superior. Thoughts?
Last edited:
