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					Originally Posted by Mermet  The designation was surely not R6, then R6 on this plane was the PSK 12 for all weather flying. | 
	
 You mixed up /R6 with R VI. /U4 was only applied to the Motorkanone, nothing else. The /U4 versions were intended to be fitted with optional MK 108 gondola weapons but these gondolas were never introduced. Some G-6/U4 + G-14/U4 were built in Györ,Hungary.