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List of Reference Dimensions for AK Barrels and Their Components

Started by loner42 , May 26 2008 02:06 PM

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#1 loner42

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Posted 26 May 2008 - 02:06 PM

The following is a list of reference dimensions for barrel and barrel components for those of you who want to use different components and different barrels on your builds.
All measurements were made as accurately as possible and should fall within + or - .001
.Some were made on stripped barrels and components and some were made on assembled rifles as I did’nt want to dismantle them just for measurements.Some were unobtainable,( as in not enough area to measure )All were taken from my personal rifles and kits. I will add to and update this list as I can and intend to post it on as many gunboard BIY forums as possible.

If you have suggestions for other dimensions related to the barrel group feel free to throw it out there. I've spent about 3 days on this and typed it all out on Word, and then copied and pasted it here and everything went to Shit . I had everything in nice straight columns and as soon as i pasted it to the reply box, everything went all Mumbo Jumbo.............. For the life of me i cannot figure out how to get everything back into straight columns and i'm tired of Muckin with it. So if anyone knows how, and is willin to straighten this up and make it look a little more professional, be my guest.
Here we go and happy building………………

BARREL OVERALL LENGTH

SAIGA .223………………………………………………………………………………………........16 ¼
SAIGA .308……………………………………………………………………………………….........16 ¼
BULGARIAN 5.45 AK-74………………………………………………………………………......16 ¼
MAADI 7.62X39…………………………………………………………………………………......16 1/2
HUNGARIAN SA2000M 7.62X39………………………………………………………………...16 1/4
HUNGARIAN AMD 65 ………………………………………………………………………….........12 ½
HUNGARIAN AMD 63…………………………………………………………………………..........16 ½
ROMANIAN G …………………………………………………………………………………........... 16 ¼
YUGOSLAVIAN AB2…………………………………………………………………………….......16 ¼
YUGOSLAVIAN VIRGIN KRINK………………………………………………………………..........10
YUGOSLAVIAN M72 RPK……………………………………………………………………….......21 ¼
RUSSIAN MILLED AK-47……………………………………………………………………….......16 ¼
ROB. ARMS VEPR 7.62X39……………………………………………………………………....16 5/8
POLISH U/F 7.62X39…………………………………………………………………………….....16 ¼
POLISH TANTAL 5.45X39……………………………………………………………………....16 5/8
MAK 90 7.62X39 U/F……………………………………………………………………………......16 ½
MILLED TYPE 56 7.62X39………………………………………………………………………....16 ¼

CHAMBER OUTSIDE DIAMETER

SAIGA .223……………………………………………………………… ………………………..........N/A
SAIGA .308……………………………………………………………………………………......... .. 986
BULGARIAN 5.45 AK-74………………………………………………………………………........ N/A
MAADI 7.62X39…………………………………………………………………………………......... N/A
HUNGARIAN SA2000M 7.62X39………………………………………………………………...... N/A
HUNGARIAN AMD 65 ………………………………………………………………………......... .908
HUNGARIAN AMD 63…………………………………………………………………………......... .908
ROMANIAN G …………………………………………………………………………………........... .908
YUGOSLAVIAN AB2……………………………………………………………………….......... .908
YUGOSLAVIAN VIRGIN KRINK……………………………………………………………........ .908
YUGOSLAVIAN M72 RPK……………………………………………………………………........ .908
RUSSIAN MILLED AK-47………………………………………………………………………........ N/A
ROB. ARMS VEPR 7.62X39……………………………………………………………………...... .908
POLISH U/F 7.62X39…………………………………………………………………………...... .908
POLISH TANTAL 5.45X39…………………………………………………………………...... .908
MAK 90 7.62X39 U/F…………………………………………………………………………....... .762
MILLED TYPE 56 7.62X39……………………………………..……………………………...... N/A

MUZZLE THREAD / THREAD LENGTH

SAIGA .223…………….......................................................................
..N/A
SAIGA .308…………………………………………………………………………………................N/A
BULGARIAN 5.45 AK-74……M24 X 1.5 RH…………………………………………....... .780
MAADI 7.62X39……………………………………………………………………………..............N/A
HUNGARIAN SA2000M 7.62X39………………………………… ………………………......... N/A
HUNGARIAN AMD 65 …………M14 X 1 LH………………………………………….......... .610
HUNGARIAN AMD 63…………M14 X 1 LH………………………………………….......... .570
ROMANIAN G …………………M14 X 1 LH…………………………………………............. .560
YUGOSLAVIAN AB2…………M14 X 1 LH………………………………………….......... .560
YUGOSLAVIAN VIRGIN KRINK………M26 X 1.5 LH……………………………… ........ .700
YUGOSLAVIAN M72 RPK……………M14 X 1 LH…………………………. ………......... .580
RUSSIAN MILLED AK-47…………M14 X 1 LH…………………………………….......... .560
ROB. ARMS VEPR 7.62X39… NO THREADS .614 DIA…………………………... .500
POLISH U/F 7.62X39……………M14 X 1 LH………………………………………........ .590
POLISH TANTAL 5.45X39……M14 X 1 LH…………………………………………...... 1.500
MAK 90 7.62X39 U/F………THREADS TURNED OFF .530 DIA……………….... .640
MILLED TYPE 56 7.62X39……M14 X 1 LH………………………………………….. ......570

BARREL DIA. FOR GAS BLOCK / G.B. OVERALL LENGTH

SAIGA .223……….................... 631 ……………..................................1.410
SAIGA .308…………….............. .712 ………………………………………………...... 1.400
BULGARIAN 5.45 AK-74…….......592 . ……………………………………………...... 1.425
MAADI 7.62X39……………......... .592 ……………………………………………...... 1.060
HUNGARIAN SA2000M 7.62X39 ..591 ……………………………………………...... 1.050
HUNGARIAN AMD 65 ………….......592 …………………………………………… ......1.060
HUNGARIAN AMD 63……………......592 ……………………………………………. ......1.060
ROMANIAN G …………………..........592 ……………………………………………... .....1.065
YUGOSLAVIAN AB2……………......631 ……………………………………………. ....1.540
YUGOSLAVIAN VIRGIN KRINK......591 ……………………………………………...... 1.665
YUGOSLAVIAN M72 RPK………. .808 ……………………………………………...... 1.440
RUSSIAN MILLED AK-47……….. .631 ……………………………………………..... 1.450
ROB. ARMS VEPR 7.62X39……… .790 …………………………………………….... .. 1.060
POLISH U/F 7.62X39……………. .592 …………………………………………….. ... 1.060
POLISH TANTAL 5.45X39……… .580 ……………………………… ……………...... 2.070
MAK 90 7.62X39 U/F…………….. .631 ……………………………………………... . ..1.350
MILLED TYPE 56 7.62X39……… .631 ………………………………. …………….. .. 1.450

GAS BLOCK DIMENSIONS

DISTANCE TO CENTER OF GAS HOLE FROM :
FR. OF GAS BLOCK / HOLE DIA. / R. OF GAS BLOCK

SAIGA .223……………… .990 …………………… .180 …………………………….. .418
SAIGA .308……………… 975 ……………………… .I80 ………………………….... .415
BULGARIAN 5.45 AK-74………………………………………….....................................
MAADI 7.62X39…………………………………………………….......................................
HUNGARIAN SA2000M 7.62X39 …………......................................................
HUNGARIAN AMD 65 ………………………………… .....133 .....................................
HUNGARIAN AMD 63………………………………… ......149………….............................
ROMANIAN G ……………………………………………..... 149………...............................
YUGOSLAVIAN AB2… .438 ………………….......149 ……….....................1.100
YUGOSLAVIAN VIRGIN KRINK……………………………….........................................
YUGOSLAVIAN M72 RPK……………………………… ..122 ………...............................
RUSSIAN MILLED AK-47……………………………… .175………................................
ROB. ARMS VEPR 7.62X39………………………………………......................................
POLISH U/F 7.62X39…………………………………....149 …………...........................
POLISH TANTAL 5.45X39……………………………………….....................................
MAK 90 7.62X39 U/F…………………………………… 175………................................
MILLED TYPE 56 7.62X39…………………………….. 172……………………………………….....

BARREL DIA. @ HANDGUARD RETAINER

SAIGA .223……………………………………………………………… ………………………....... N/A
SAIGA .308………………………………………………………………………………………........ N/A
BULGARIAN 5.45 AK-74………………………………………………………………………..... .667
MAADI 7.62X39…………………………………………………………………………………..... .670
HUNGARIAN SA2000M 7.62X39………………………………………………………………... .668
HUNGARIAN AMD 65 …………………………………………………………………………...... .670
HUNGARIAN AMD 63…………………………………………………………………………...... .669
ROMANIAN G ……………………………………………………………………………………........ .668
YUGOSLAVIAN AB2…………………………………………………………………………....... .688
YUGOSLAVIAN VIRGIN KRINK……….................................................... .689
YUGOSLAVIAN M72 RPK………………………………………………………………………..... .944
RUSSIAN MILLED AK-47………………………………………. ……………………………….... .686
ROB. ARMS VEPR 7.62..................................................................... N/A
POLISH U/F 7.62X39...................................................................... .668
POLISH TANTAL 5.45X39…………………………………………………………………….... .657
MAK 90 7.62X39 U/F…………………………………………………………………………….... .688
MILLED TYPE 56 7.62X39…………………………………………………………………….... .688

BARREL DIA. @ FSB / OVERALL LENGTH OF FSB

SAIGA .223………………………… .... .594 ………………………………….................2.330
SAIGA .308…………………………. .....671 ………………………………………............1.625
BULGARIAN 5.45 AK-74………... .572 …………………………………………………… 1.300
MAADI 7.62X39…………………..... .572…………………………………………………….... .865
HUNGARIAN SA2000M 7.62X39 ….572……………………………………………………..... .850
HUNGARIAN AMD 65 …………….... .572…………………………………………………… .....850
HUNGARIAN AMD 63……………..... .572 ……………………………………………………. 1.050
ROMANIAN G ……………………....... .592 ……………………………….................... .865
YUGOSLAVIAN AB2…………… ......592 ……………………………………............. 1.235
YUGOSLAVIAN VIRGIN KRINK.......592 ………………………………....................1.665
YUGOSLAVIAN M72 RPK………… ... N/A……………………………………………........ 1.130
RUSSIAN MILLED AK-47………..... .591 ………………………………………………..... 1.170
ROB. ARMS VEPR 7.62X39………… N/A…………………………………………………… 1.050
POLISH U/F 7.62X39……………… .572……………………………………………………… .850
POLISH TANTAL 5.45X39……… .562…………………………………......................850
MAK 90 7.62X39 U/F……………... .592 …………………………........................1.165
MILLED TYPE 56 7.62X39………. .592…………………………….......................1.450

GAS TUBE LENGTH

SAIGA .223……………………………………………………………………………………… 6.970
SAIGA .308……………………………………………………………………………………….. 6.950
BULGARIAN 5.45 AK-74………………………………………………………………………. 6.970
MAADI 7.62X39………………………………………………………………………………… 6.970
HUNGARIAN SA2000M 7.62X39……………………………………………………………… 5.740
HUNGARIAN AMD 65 …………………………………………………………………………. 5.770
HUNGARIAN AMD 63…………………………………………………………………………... 6.940
ROMANIAN G …………………………………………………………………………………... 6.970
YUGOSLAVIAN AB2………………………………………………………………………….. 7.540
YUGOSLAVIAN VIRGIN KRINK……………………………………………………………... 6.060
YUGOSLAVIAN M72 RPK…………………………………………………………………….. 7.530
RUSSIAN MILLED AK-47……………………………………………………………………… 6.970
ROB. ARMS VEPR 7.62X39…………………………………………………………………….. 6.970
POLISH U/F 7.62X39…………………………………………………………………………... 6.970
POLISH TANTAL 5.45X39……………………………………………………………………. 6.980
MAK 90 7.62X39 U/F…………………………………………………………………………... 6.980
MILLED TYPE 56 7.62X39…………………………………………………………………….. 6.980

I will post more dimensions as I acquire them…………………

Edited by loner42, 29 May 2008 - 01:38 PM.

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#2 Azrial

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Posted 26 May 2008 - 02:16 PM

Don't worry about the columns, the information is a good reference. Good Work!

ΜΟΛΩΝ ΛΑΒΕ - I stand with Arizona!

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#3 loner42

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Posted 26 May 2008 - 11:25 PM

Don't worry about the columns, the information is a good reference. Good Work!

Thanks,
it just bugs me that i can't keep them straight up and down like i had them in Word. I even printed them out and the stayed nice and straight. It must have something to do with margins or something. I'm still a "hunt and peck" typer, so it takes me awhile sometimes to do something like this. Maybe someone who knows how will volunteer to fix it someday.

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#4 Vorpal

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Posted 27 May 2008 - 05:13 PM

Thanks for investing your time on this. It will be very helpful for the tinkers among us.
Vorpal

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#5 DeadMilkman

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Posted 20 July 2009 - 07:51 PM

I fixed this over on AKForum, too. What can I say? Uneven spacing bothers me, too. I've spent too much time as an admin assistant, I reckon. :unsure:

BARREL OVERALL LENGTH
SAIGA .223				   16 ¼
SAIGA .308				   16 ¼
BULGARIAN 5.45 AK-74		 16 ¼
MAADI 7.62X39				16 ½
HUNGARIAN SA2000M 7.62X39	16 ¼
HUNGARIAN AMD 65			 12 ½
HUNGARIAN AMD 63			 16 ½
ROMANIAN G				   16 ¼
YUGOSLAVIAN AB2			  16 ¼
YUGOSLAVIAN VIRGIN KRINK	 10
YUGOSLAVIAN M72 RPK		  21 ¼
RUSSIAN MILLED AK-47		 16 ¼
ROB ARMS VEPR 7.62X39		16 5/8
POLISH U/F 7.62X39		   16 ¼
POLISH TANTAL 5.45X39		16 5/8
MAK 90 7.62X39 U/F		   16 ½
MILLED TYPE 56  7.62X39	  16 ¼

 
							 CHAMBER OUTSIDE DIAMETER 
SAIGA .223				   N/A
SAIGA .308				   .986
BULGARIAN 5.45 AK-74		 N/A
MAADI 7.62X39				N/A
HUNGARIAN SA2000M 7.62X39	N/A
HUNGARIAN AMD 65			.908
HUNGARIAN AMD 63			.908
ROMANIAN G				  .908
YUGOSLAVIAN AB2			 .908
YUGOSLAVIAN VIRGIN KRINK	.908
YUGOSLAVIAN M72 RPK		 .908
RUSSIAN MILLED AK-47		N/A
ROB ARMS VEPR 7.62X39	   .908
POLISH U/F 7.62X39		  .908
POLISH TANTAL 5.45X39	   .908
MAK 90 7.62X39 U/F		  .762
MILLED TYPE 56 7.62X39	  N/A

							 MUZZLE THREAD				 THREAD LENGTH
SAIGA .223				   N/A
SAIGA .308				   N/A
BULGARIAN 5.45 AK-74		 M24 X 15 RH					.780
MAADI 7.62X39				N/A
HUNGARIAN SA2000M 7.62X39	N/A
HUNGARIAN AMD 65			 M14 X 1 LH					 .610
HUNGARIAN AMD 63			 M14 X 1 LH					 .570
ROMANIAN G				   M14 X 1 LH					 .560
YUGOSLAVIAN AB2			  M14 X 1 LH					 .560
YUGOSLAVIAN VIRGIN KRINK	 M26 X 1.5 LH				   .700
YUGOSLAVIAN M72 RPK		  M14 X 1 LH					 .580
RUSSIAN MILLED AK-47		 M14 X 1 LH					 .560
ROB ARMS VEPR 7.62X39		NO THREADS .614 DIA			.500
POLISH U/F 7.62X39		   M14 X 1 LH					 .590
POLISH TANTAL 5.45X39		M14 X 1 LH					 1.500
MAK 90 7.62X39 U/F		   THREADS TURNED OFF .530 DIA	.640
MILLED TYPE 56 7.62X39	   M14 X 1 LH					 .570


							 BARREL DIA FOR GAS BLOCK   GB OVERALL LENGTH
SAIGA .223				   .631					   1.410
SAIGA .308				   .712					   1.400
BULGARIAN 5.45 AK-74		 .592					   1.425
MAADI 7.62X39				.592					   1.060
HUNGARIAN SA2000M 7.62X39	.591					   1.050
HUNGARIAN AMD 65			 .592					   1.060
HUNGARIAN AMD 63			 .592					   1.060
ROMANIAN G				   .592					   1.065
YUGOSLAVIAN AB2			  .631					   1.540
YUGOSLAVIAN VIRGIN KRINK	 .591					   1.665
YUGOSLAVIAN M72 RPK		  .808					   1.440
RUSSIAN MILLED AK-47		 .631					   1.450
ROB ARMS VEPR 7.62X39		.790					   1.060
POLISH U/F 7.62X39		   .592					   1.060
POLISH TANTAL 5.45X39		.580					   2.070
MAK 90 7.62X39 U/F		   .631					   1.350
MILLED TYPE 56 7.62X39	   .631					   1.450

							 GAS BLOCK DIMENSIONS
							 DISTANCE TO CENTER OF GAS HOLE FROM:
							 FR OF GAS BLOCK	HOLE DIA	R OF GAS BLOCK
SAIGA .223				   .990			   .180		.418
SAIGA .308				   .975			   .I80		.415
BULGARIAN 5.45 AK-74
MAADI 7.62X39
HUNGARIAN SA2000M 7.62X39
HUNGARIAN AMD 65								.133
HUNGARIAN AMD 63								.149
ROMANIAN G									  .149
YUGOSLAVIAN AB2			   .438			  .149		1.100
YUGOSLAVIAN VIRGIN KRINK
YUGOSLAVIAN M72 RPK							 .122
RUSSIAN MILLED AK-47							.175
ROB ARMS VEPR 7.62X39
POLISH U/F 7.62X39							  .149
POLISH TANTAL 5.45X39
MAK 90 7.62X39 U/F							  .175
MILLED TYPE 56 7.62X39						  .172


							 BARREL DIA @ HANDGUARD RETAINER
SAIGA .223				   N/A
SAIGA .308				   N/A
BULGARIAN 5.45 AK-74		 .667
MAADI  7.62X39			   .670
HUNGARIAN SA2000M 7.62X39	.668
HUNGARIAN AMD 65			 .670
HUNGARIAN AMD 63			 .669
ROMANIAN G				   .668
YUGOSLAVIAN AB2			  .688
YUGOSLAVIAN VIRGIN KRINK	 .689
YUGOSLAVIAN M72 RPK		  .944
RUSSIAN MILLED AK-47		 .686
ROB ARMS VEPR 7.62			N/A
POLISH U/F 7.62X39		   .668
POLISH TANTAL 5.45X39		.657
MAK 90 7.62X39 U/F		   .688
MILLED TYPE 56 7.62X39	   .688


							 BARREL DIA @ FSB   OVERALL LENGTH OF FSB
SAIGA .223				   .594			   2.330
SAIGA .308				   .671			   1.625
BULGARIAN 5.45 AK-74		 .572			   1.300
MAADI  7.62X39			   .572			   .865
HUNGARIAN SA2000M 7.62X39	.572			   .850
HUNGARIAN AMD 65			 .572			   .850
HUNGARIAN AMD 63			 .572			   1.050
ROMANIAN G				   .572			   .865
YUGOSLAVIAN AB2			  .592			   1.235
YUGOSLAVIAN VIRGIN KRINK	 .592			   1.665
YUGOSLAVIAN M72 RPK		  N/A				1.130
RUSSIAN MILLED AK-47		 .591			   1.170
ROB ARMS VEPR 7.62X39		N/A				1.050
POLISH U/F 7.62X39		   .572			   .850
POLISH TANTAL 5.45X39		.562			   .850
MAK 90 7.62X39 U/F		   .592			   1.165
MILLED TYPE 56 7.62X39	   .592			   1.450
											 
							 GAS TUBE LENGTH
SAIGA .223				   6.970
SAIGA .308				   6.950
BULGARIAN 5.45 AK-74		 6.970
MAADI 7.62X39				6.970
HUNGARIAN SA2000M 7.62X39	5.740
HUNGARIAN AMD 65			 5.770
HUNGARIAN AMD 63			 6.940
ROMANIAN G				   6.970
YUGOSLAVIAN AB2			  7.540
YUGOSLAVIAN VIRGIN KRINK	 6.060
YUGOSLAVIAN M72 RPK		  7.530
RUSSIAN MILLED AK-47		 6.970
ROB ARMS VEPR 7.62X39		6.970
POLISH U/F 7.62X39		   6.970
POLISH TANTAL 5.45X39		6.980
MAK 90 7.62X39 U/F		   6.980
MILLED TYPE 56 7.62X39	   6.980

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#6 PoisonYouth

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Posted 22 May 2011 - 07:55 PM

Hey man, thanks for the info! I was curious if you knew what size the barrel diameter around the Saiga 5.45(iz240) is at the FSB, not sure if they use the AK-74 barrel or not.

Derp?

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#7 Scott Kenny

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Posted 26 May 2011 - 05:28 AM

When you say 'chamber outside diameter', is that measured at the spot where the barrel presses into the front trunnion?

Yes, that is my real name. I don't say anything here that I wouldn't say to your face, and I don't care what 'Big Brother' knows about my interests.

Real names on a forum cut down on flame wars.

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#8 loner42

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Posted 12 June 2011 - 01:32 PM

Hey man, thanks for the info! I was curious if you knew what size the barrel diameter around the Saiga 5.45(iz240) is at the FSB, not sure if they use the AK-74 barrel or not.

Sorry , haven't had one to measure yet.................