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Not in the slightest. They were using this barrel diameter a while before the AK-74 was made. In other words, it was within the design parameters for the 7.62.

 

 

 

 

Barrel diameters at gas block and length of gas block:

 

 

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

Barrel Diameter at front sight block and length of sight block:

 

 

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

Edited by W8lifter
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