These aluminum frame High Standard revolvers have steel barrels and cylinders and are very well made. They were made right alongside the notably high quality and treasured Hi-Standard (the company's name switches between High and Hi depending on which literature you read and what the company printed on their gun boxes over the years) .22 semi-auto target pistols. The grip fits the human hand very well, unlike most factory S&W and Colt grips. Skeeter Skelton once said in print that High Standard really got the grip right on their Sentinel revolvers and I think he was right! 9 shots 4 inches . more than most people can brag about