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Posted: 1/30/2008 6:39:40 AM EDT
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I am ready to start assembling my receiver. My trunions are nicked up from the demill, so I smoothed down the rough edges and was going to put some perma-blue on them before I assembled. Then I got to thinking, should I also blue the areas of the receiver that will be covered by the trunions? Once it is all assembled and tested I will be coating with alumahyde II. So should the inside metal on metal contacts be blued first for rust protection? Thanks |
This is a good question and one I thought about for some time too. In the end as I demilled several kits I noted that none of the factory built rifles I worked with, Polish PMKMS UF, Polish Tantal, Yugo M92, Bulgy AKS-74U and Romy G had any kind of coating at all between trunion and reciever. In fact some like the M92 Yugo Krink "as new and unfired" kit I bought had a little rust between the trunion and rec stub. I came to the conclusion that this is not a real issue that any of the major factories care about. So with all of my builds I have not done any coating of the trunion or reciever in this area. I do paint as much of the inside of the rec as I can when I do the recoating but do not worry about the area between rec and trunion. When I have coated and baked the build I oil the trunion areas and wipe them down and reassemble. It has worked for me but you will have to decide how you want to do it for yourself. |
+1 in fact, some brand new SAR rifles have "rust" in that area.... but if you just squite oil on it, over time it stops rusting. "mystical" (spoken in eire voice) |
| Currently I finish all metal surfaces with either a light coat of Duracoat (we are working on parkerizing and galvanizing the steel to replace that). For the flats we spot weld the lower rails in before we fold them and I like to coat the inside of the receiver between spot welding the lower rails in and bending the flat. That way you get more protection and will prolong the life of the weapon. You don't have to do this and the majority of AKs built do not have any sort of anti-corrosion protection on the inside or on the trunions prior to assembly (of course most use grease and that helps). So it is a personal decision and one I would advise doing to protect your investment/build. |
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