The site seems to be being re-built, I got this info from another site;
Aircraft quality Aluminium and 17-4 Stainless Steel,
External coating - Hard Anodized.
Internal - 1200 micron Alocrom
Dimensions:
Stealth 10
Weight- 650 grams, Overall length 328.64mm, Over barrel 216.20mm, Diameter 50.15mm
Stealth 10 Compact
Weight - 580 grams, Overall length 264.64mm, Over barrel 156.20mm, Diameter 50.15mm
A7
Weight - 300 grams, Overall length 175.272mm, Over barrel 91.31mm, Diameter 40.87mm
These weights seem to be much higher than the Sparton from Third Eye Tactical, which is hard anodized and with stainless inserts in the baffles and weighs 440g;
SPARTAN MODERATOR(END MOUNT)
WEIGHT: 440 Grammes
LENGTH OF OVERHANG: 160mm
MODERATOR DIAMETER: 42mm
MODERATOR O/A LENGTH: 174mm Maximum
Regards, Simon