wk180 with 1 inch piston?

T

the radium king

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so, on my rwa upper (not sure if the same as a wk180 upper) there is about 1" of material on the front of the receiver. ie, it's about 1" from the base of the barrel mount to the inside face where the bolt carrier stops.

also, the short stroke piston only travels about 1".

so, why not design a captured +/- 1" piston that just sits in the receiver? use a standard AR gas block and a shortened gas tube to get gas to it. thinking a threaded fitting to connect the gas tube and get the piston out for cleaning. you could drill a hole in the side of the receiver to vent at end of travel. chromed piston and perhaps an insert in the aluminum receiver to reduce wear.

less weight, less to break. perhaps use pencil barrels again, at whatever gas length you like.
 
the radium king said:
so, on my rwa upper (not sure if the same as a wk180 upper) there is about 1" of material on the front of the receiver. ie, it's about 1" from the base of the barrel mount to the inside face where the bolt carrier stops.

also, the short stroke piston only travels about 1".

so, why not design a captured +/- 1" piston that just sits in the receiver? use a standard AR gas block and a shortened gas tube to get gas to it. thinking a threaded fitting to connect the gas tube and get the piston out for cleaning. you could drill a hole in the side of the receiver to vent at end of travel. chromed piston and perhaps an insert in the aluminum receiver to reduce wear.

less weight, less to break. perhaps use pencil barrels again, at whatever gas length you like.
Click to expand...

Ustauk said:
It sound similar to the Perum Arms Tinck X16 from Slovenia:
Click to expand...

I was honestly thinking about something like this yesterday, as I sat and was searching the threads for new Templar and Siberian information. I'd love to see something like the Perum Arms Tinck in this country.
 
i was thinking about this a little more and my inner engineer realised a bit of a flaw in thinking - i was thinking a piston the diameter of the piston rod (say 1/4" or less) but really you need a larger piston (i.e. the size of the piston cup at the end - almost 1/2") as force is proportional to area. so, that would take up a lot of real estate over the barrel - a tall clunky rifle.

BUT, what if you just moved the original gas block (or something similar) as close to the barrel nut as possible and shortened the piston accordingly? then use an AR gas block and tube to get the gas to it via a fitting that replaces the gas plug? shorter piston less likely to break, can run a longer gas system with less barrel flex?
 
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