Looks like an interesting and fun project. I haven't seen a RPK underfolder before. It's always fun to build something different.
Arsenal of Bulgaria actually builds these. They have underfolders in every caliber as well as the usual clubfoot variety, but yes I was aiming to have something a bit different from the usual here in the USA.chuck1 said:Looks like an interesting and fun project. I haven't seen a RPK underfolder before. It's always fun to build something different.
You can, but true RPK recievers are not easy to get unless you use a VEPR as a donor rifle. However, Aresenal of Bulgaria uses milled recievers for their RPKs. These are the same as other milled AKs.Bluejack said:not try change subject, can you ues any RPK barrels on any AK recivers, someone said maybe need heavy recivers
As long as you get a "coldsteel" RPK bent blank, you should be fine to use the RPK barrel as-is. You could mill the buldges off of the front trunion and use a standard receiver, but then there is the fact that the trunion is narrower than a standard AK trunion. A Global receiver may just be the correct thickness for an RPK trunion. Why couldn't they just make a standard barrel/receiver combo?Bluejack said:PT, I got a 7.62 RPK barrels ( not here yet) , the guy sold it to me said it should fit the stamp reciver since barrels still had the front trunion, plus we are not doing full auto build so don't need a heavy recivers? so what you think ? by the way, I know some one may still have NHM 91 RPK kit for sale
It is not that the RPK needs the heavy receiver for Full Auto fire, it is the fact that the trunion is narrower and fits loosely in a standard receiver. You actually should shim it in the receiver.Bluejack said:not try change subject, can you ues any RPK barrels on any AK recivers, someone said maybe need heavy recivers
Didn't that NHM-91 kit come with the trunnion? If not I believe it uses a 19mm trunnion (somebody correct me if I'm wrong).Bluejack said:so what size are we looking for at front trunion, I got a russian RPK and chinese RPK coming in mail .
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Your pick really, OOW may be your best bet. You don't want to use the Coldsteel RPK blank because you don't have nor can use RPK trunnions with that barrel. That said the chioce is yours.Bluejack said:my RPK come with trunnion , not sure what size, and where and what type of reciver will be best for this build ?
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They'd be fine for your NHM-91, if your REAL RPK barrel has the original trunnion then you have to make a choice. You could use its trunnion but I don't know of any options other than using the Coldsteel blank, or you could use a standard trunnion in one of your Vulcan Recievers. You really have 20?Bluejack said:I see, I have 20 of these Vulcan recivers at house, was think about use one of these, I just hear ppl siad the RPK trnnions is small then AK trunions so maybe need different recivers
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