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I picked up a 91 date code hk so..79".

It has a stamping on the back of the bolt carrier "WHA"? anyone know what this is?

When were polyoganal barrels used in 91's?

Thanks guys!
 

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I no that some of the 1976 guns had a polyoganal barrels
 

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I believe that the polygonal barrels were utilized on the HK91's (1975-1978), as well as on the HKSR9/SR9T/SR9TC (1990 and 1993)!!! :wink:

Tony
 
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