This afternoon I had a visit at a local gold buyer's shop so I brought the DanKung Ergonomic OTT frame.  After all the gold was checked I had the employee check the metal composition on the Ergo-OTT.  One reading was taken on each fork so two sets of numbers are shown below.  As always, the readings on each fork were not identical but still correct.  The Olympus Gold Xpert Analyzer is quite expensive and accurately calibrated with certification.  The Ergo OTT frame appears to be 304 stainless steel.  The element percentages match a 304 alloy.  No zinc was detected so the frame is very strong and safe to shoot. Ergonomic OTT FrameFe = 71.88 & 72.88Cr = 19.56 & 18.36Ni = 7.89 & 8.00Mn = 0.67 & 0.24 Notes:  - above numbers are percentages- Fe = iron, Cr = chromium, Ni = nickel, MN = manganese