View Full Version : Need to know about trunion sizes
02-13-2004, 03:04 AM
I had this weird idea and I need to know what the largest trunion size I can get in a standard ak stamped receiver is. ie: polish /romainian 47/ 74 RPK ? the object is to use the heavieast barrel blank I can. 23mm is the biggest I have seen advertised, are RPK 's bigger ? can I get them ? does anyone know ? ( I would need the matching gas block and rear sight block ... may or may not need the front sight undecided on that yet. Does anyone here know ? maybe a rundown on who used what size ? maybe that should go in a sticky FAQ ? ( maybe it is and I am just to dumb to find it ) oh well if anyone knows and cares to answer it would fuel my fantasies for some time.
Dan ( with way to much winter left in front of me )
02-14-2004, 06:32 PM
is this what you are looking for http://www.aa-ok.com/AK_Tech/aktechinfo.htm hope this helps.
02-15-2004, 04:19 PM
Dan, I don't know what you're working on, but since the trunion is an interferance fit, the size of the barrel (blank sets off warning bells in my mind) shouldn't be too important; the trunion is going to add a lot of strength to the barrel. Are you perhaps thinking of an "alternative round" for the AK? I assume you're aware that Saiga is made in .308; that has a slightly larget trunion, but more for the 3 locking lugs than for the strength. The barrel is larget diameter, also. You might want to consider getting a .308 Saiga for receiver/trunion/gas block/rear sight block/front sight block.
Saiga also makes a .410 shotgun which has been the starting point for fantasies for several. (AK in .45WinMag; AK in .44Mag/.44Spl suppressed)
Hope this helps. If I can help with anything else (fantastic) let me know.
02-15-2004, 07:01 PM
Nothing that serious. I am looking to do a heavy barrel and maybe flute it.
Just like the look of a short fat tube, and since I am building it up anyway it makes sense to get the trunnions and related "stuff" with the largest holes I can. K-var and other have various trunnions for sale and some have RPK kits and parts... was just wondering if indeed the RPK's were " bigger" ( ie: allow a fatter barrel)
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