The Sierra-Pro is a B-18/19 clone, but who makes it I'm not sure. The good news is that they turn out to be great rifles with a tune and some TLC. Tuned by a "pro-tuner" will bring out the best in them, but something as simple as a DIY deburr and lube tune will make them very acceptable shooters. The best mod would be to install a GRT-III trigger. You can smooth out the rough edges of the factory trigger, but this is best left to those with experience. Too much can be dangerous!!! I would recommend shooting around 2K rounds before doing anything at all. This way you will break in the mechanics some and season the barrel as well. I don't recommend cleanning the barrel too often,.....about every 1000 rounds or so,...but with a dry patch or a wool tip on the end of a cleanning rod. Some folks insist on cleanning them ( the barrels) to be real 'shiney and spotless' but being a new gun,..it will only dirty back up with the factory lubes migrateing out of the action while it's still a relativily new weapon. Forget lead free super velocity BS pellets,...they are junk. Stay with the 7.9 grainned pellets such as the Crosmans, up to the 8.8 Beeman Cromags or FTS's. Lowest weight I'd dare go would be something like the Gamo hunters or Beeman Silver-Bears in the mid 7.65 grainned weight. For breaking in the Sierra-Pro, use the cheapo Crosman Premier HP's from Wal-mart. IMO, the SP is a great 25/30 yard hunter,..though not an elephant gun, it's powerful enough to take out small game, light-weight, easy to shoulder, and with a tune after break in,.....a great entry level AR that will give you many years of enjoyment. Welcome to the "addiction" of air guns!!!! The B-26 has a great following amongst many air rifle shooters,...and Mike Melick does impecable work on them!!! Hope this advice helps you out, tjk