Ah you have credentials That s nice I ve got them too The 550 series is derivative of the AK That you doubt this clouds your credibility as an editor Read this I m not the only one who thinks so Now having had the occassion to compare my AKM my SG 551 a dealer s HK G36C and an friend s FNC I can say from firsthand experience that the FNC and SIG are CLEARLY derivative The G36 however is a completely different design based on the Armalite AR 18 actually unused Armalite patents You love your gun yes but ownership of a firearm does not make you an expert on said firearm The inch measurements stay as an aid to us rebels and the AK reference stays If you disagree you ll lose in mediation SIG Maybe not now but then again Ruger isn t Ruger either it s Sturm Have a wonderful day