Can someone verify a mesurment for me - please?

[TbcSEOD]

I need someone to verify a measurement from the rear of the camming window to the center of the forward recuporator bolt hole. I am 99% certain I got my measurements right but it almost seems like the "piston" is to far forward when I close my barrel door (It jams the barrel door and barrel up - I can get it in but I have to wiggle and pry some and I am certain this isn't how it was done in the heat of battle.......... I am wondering if I got my measurements off by about 3 hairs or something here........

Picture shows what measurements I need specifically.

TIA,
TbcSEOD

[tr6guns]

Hope this helps

[longhorn109]

Is the front recoup bolt the right way around? I remember reading somewhere here that if the bolt is the wrong way about it lets the plunger stick out a little to far. I cannot get an accurate measurement on my deactivated guns as the camming section is still fitted.

[c310pilot]

I have the same problem. I need to take apart the recup and clean it really well and the try putting some of that Mi-Comm 25 on, in, around, all surfaces esp where the barrel comes in contact with the beveled front edge of the plunger. Mayt be that will fix things enough. I hate to cut the thing in half!

I guess the true measurement needed would be the amount of overlap between barrel and plunger. I am roughly .125? Its hard to measure in there!

[TbcSEOD]

I spoke with 2 guys I know that have up and running MG's and one reported 1inch exactly and the other reported 1.033. One also suggested to re face the bevel - and I did that but have not had time to refit it and check it over again.

[tr6guns]

If you take the print above and the dim. 2.537 and subtract .156 and 1.281 you come up with 1.100. but i guess that is only the way it looks to me

[MGMike]

I went out and re-measured the part I used for the drawing. It is original, uncut between the two points you are looking for. I came up with 1.1", or more likely 28 millimeters, from the back edge of the cam piece "window" and the center of the recouperator bolt hole. I hope this picture helps.

MikeD