Results 1 to 10 of 14
Thread: AK parts question
Hybrid View
-
January 19th, 2010, 03:37 AM #1
AK parts question
During one of my stretches of random thinking, I started getting curious as to the parts differences between the AK47 and the AK74. What kind of parts compatibility is there between the two?
Are the trigger groups the same? Are the receivers close in dimensions? Could you take an underfolder back half and stick it on a 5.45 caliber front half? Are the standard stock, pistol grip and forend pieces the same?
-
January 19th, 2010, 08:58 AM #2
Re: AK parts question
Some off the top of my head.
The barrel components: Other than cosmetic like lightning cuts etc. The barrels on 5.45 are typically thicker than 7.62 so the ID of the parts are bigger on 5.45 guns.
Barrel: 5.45 are typically thicker plus bore is different.
Bolt: Obviously are different
Receiver: The ejection ports and I believe magwells would need to be modified. Not sure about the rails.
Stocks: I believe that the standard stocks are interchangeable but I'm not completely sure about that. I guess it depends on the rear trunnion. Either way, they can be made to to fit. A very popular build is the "Kyber Pass". Where people take a 7.62 rifle (typically a Romanian) and put a triangle side folder on it. The triangle side folders were only produced for AK74s. You would have to get the right trunnion and modifiy the receiver (or use the correct one if it was a kit build) to accept the latch to hold the SF stock. I don't think that there is really a difference between '47 and '74 underfolder stocks.
Hope this helps.
edit: Anything COULD be done. Its just a matter of how much work you are willing to put into it.
-
January 22nd, 2010, 03:25 AM #3Super Member
- Join Date
- Nov 2008
- Location
-
New Holland,
Pennsylvania
(Lancaster County) - Posts
- 529
- Rep Power
- 215130
Re: AK parts question
Most of the furniture will be interchangeable. Depending on the make, some of the muzzle attachments can be as well--just make sure you don't put a 5.45 brake on a 7.62 gun--outcome would be very unpleasant.
The FCG's are the same. The pistol grips are the same. Some of the top-covers are the same, or at least close enough. For stamped models (which I think all 74's are) the stocks and handguards are generally interchangeable. Theoretically, even the gas tubes might be close enough to work.
Obviously the barrels are different. The bolt/carriers are different. The pistons are different in the ones I've seen, but in theory could potentially be interchanged.
The receivers are different. They have to be to accomodate the different sized magazines, rail placement for the different carriers and general design for the smaller caliber in the AK-74.
-
January 22nd, 2010, 03:43 AM #4
-
January 22nd, 2010, 09:09 AM #5
-
January 22nd, 2010, 01:22 PM #6
Re: AK parts question
_________________________________________
danbus wrote: ...Like I said before, I open carry because you don't, I fight for all my rights because
you won't, I will not sit with my thumb up my bum and complain, because you will.
-
January 25th, 2010, 08:48 PM #7
Re: AK parts question
Gloria: "65 percent of the people murdered in the last 10 years were killed by hand guns"
Archie Bunker: "would it make you feel better, little girl, if they was pushed outta windows?"
http://www.moviewavs.com/TV_Shows/Al...he_Family.html
-
January 25th, 2010, 08:53 PM #8
-
January 25th, 2010, 09:34 PM #9
Re: AK parts question
<rummages around for calipers>
<grabs various AKs, AK74s>
Okay...measured just behind the front sight:
(7.62x39)
AKMS (China)=0.592"
SAR-1 (Romania)=0.575"
MD-63 (Romania)=0.586"
(5.45x39)
SAR-3 (Romania)=0.535"
AK-74 (Russia/Bulgaria)=0.572"
Note the variation in barrel diameters, even when two examples came from the same country (SAR-1 & MD-63). This can make AK building from the ground up a real headache.
All other factors equal, the smaller bore won't require as much metal to contain the same pressure due to less unit pressure in a smaller bore. In reality this won't work well in a military gun due to poor heat dissipation, so it's a *little* smaller in diameter. The net result is a stiffer barrel with a longer expansion ratio.Gloria: "65 percent of the people murdered in the last 10 years were killed by hand guns"
Archie Bunker: "would it make you feel better, little girl, if they was pushed outta windows?"
http://www.moviewavs.com/TV_Shows/Al...he_Family.html
-
January 25th, 2010, 10:20 PM #10
Similar Threads
-
AK parts
By BenningBoy in forum GeneralReplies: 6Last Post: June 14th, 2008, 07:33 AM -
Ford parts, truck wheels & tires + other parts
By Jay5oh in forum GeneralReplies: 3Last Post: June 5th, 2008, 12:32 PM -
AK-47 Parts Kit w/ Full Auto Parts
By mojo in forum GeneralReplies: 16Last Post: May 7th, 2008, 04:32 PM -
Lower Parts Kit question
By stevieb92 in forum GeneralReplies: 13Last Post: March 20th, 2008, 12:14 PM -
WTS/WTT 10/22 Reciever & Parts, AK, & Glock Parts
By 73cj5 in forum GeneralReplies: 0Last Post: March 16th, 2008, 08:05 PM
Bookmarks