Will TNAs WK180C oil brass op rod bushing fit on stock upper?

[Noltz]

As title says? I'm putting a rifle order together and if I'm going to take it apart for inspection anyway this should be a drop in upgrade for next to nothing. Can anyone confirm? I'm asking because the videos I've seen it's always being installed on a TNA upper. Anything else I should add to an order? Spare parts? Thanks.

 

[BioPace]

Didn’t it need to be drilled out to accept the brass bush? I recall the bush being sold with a drill bit?

 

[Noltz]

That's very possible. The site shows pictures of a "drilled" and "not drilled" uppers. But I'm just unsure if the current run is machined with this insert in mind.

Edit; Answer is No, it's NOT drop in.

To install this bushing, will require some gunsmithing and a drill. You will need to widen the piston hole of your upper receiver bushing area to properly fit this upgraded part into your WK180-C. Basically, all you need to do is hit the upper with a 5/16" drill bit, and whammo! The bushing fits.

 

[Paul_T]

I put one in my early version 1 WK upper. You need to drill it out to fit.