Yahamshari Posted February 11 Report Share Posted February 11 (edited) Hello. The 17.716" barrels on my 1979 HK91 A-2 and A-3 rifles are factory marked HJLA on one side. I reached out multiple times via email and telephone to HK-USA in Columbus, GA but as in the past no one answers the telephone there or reply to emails or return calls. So I sent an email to H&K GmbH. Someone there replied that "the markings indicate the hammer-forging machine that was used to manufacture the barrels," which I am not convinced of. A fellow HK enthusiast advised that HJ reference the manufacturing year (79). Q.1 What do LA reference? Parts A B C D E F G H I J 0 1 2 3 4 5 6 7 8 9 Receivers A B C D E F G H I K 0 1 2 3 4 5 6 7 8 9 The above confirm that the barrels are proper for my HK91s ("HK" date code 79). Now, below HJLA both barrels are marked J near the breech. HK USA replied that "J is reserved for proof house use." Q.2 What does that really mean and is it true? This RFI is cross-listed on HKPRO, HK ProShop, The Firing Line, Carolina Firearms Forum, Carolina Shooter Club, and M14 Forum. Thank you. Edited March 23 by Yahamshari Quote Link to comment Share on other sites More sharing options...
Yahamshari Posted March 21 Author Report Share Posted March 21 Anyone has convincing answers to the two questions in my original post? Thank you. Quote Link to comment Share on other sites More sharing options...
Yahamshari Posted March 23 Author Report Share Posted March 23 Re: Q.1 A fellow HK enthusiast advised that LA is a lot number. Quote Link to comment Share on other sites More sharing options...
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