Was In the Sportsman's Guide wharehouse outlet store in St. Paul MN today and noticed they had 3 Stardot chokes behind the ammo counter.
#SD 912
.668 ID
Card listed application as Browning Invector/Winchester, Moss 500, H&R, Savage, Thompson Center and Ithaca, 12 gauge.
Best part: the price tag listed $32.49, but the guy said they are 50% off the price shown. So like $17.25 plus shipping. Give them a call and Get em while they're hot.
I found one new on gunbroker a week or so ago for $20 to my door. Thanks for heads up tho