I may just "try" a brass sentinel clone, although I am fancying getting another original mod tbh, my roller gets bullied lol, however hcigar also does the hcigar m16 which is sentinel inspired but they actually decided to claim it as their own, it is very tempting, particularly considering that more than a couple of these "high end" mods actually come out of Chinese cnc shops, not sure how that sits with the elitists personally I think its cool, I have a chinese telescopic sight on one of my rifles, leupold ordered a load of them to be made, once that batch was completed, the machines kept rolling, the optics, tubes and cintrols are identical to the leupold, why? Because it rolled off the same damned production line. Its my best scope, the light gathering capabilities are untrue and its stood up to five years of abuse on my tuned webly longbow a pretty hard hitting spring air rifle, one of the harshest environments a civilian scope will see.
You can hate the chinese for their flagrant copyright abuse, but the buggers cant half machine well.