That is an active Reservist. Inactive Reservists don't drill.
FULL DISCLOSURE: I was AGR with ILARNG
EDIT: It can be a bit confusing. You have your standard Active Reservist who drills monthly and does AT's. You have Individual Ready Reserve, which are technically, inactive. They periodically show up for paperwork and such until their remaining commitment is done. There is Inactive National Guard that I never completely figured out the difference from IRR. AGR is samey same 24/7/365 active duty only you are assigned and part of that unit in an AGR slot. In days of yore, these slots were Civil Service GS-5/GS-7. Civilian during the month and Guard on the weekends. Out in the Maintenance Shops (OMS), you have another system, Wage Grade (WG). It's a zoo. The Federal Techs in the shops resisted (Union) going AGR and have still been successful, as far I know.
...and you're as full of shit as your Lightworker, phuckstick.
Generally the phrase 'Active Reservist' is avoided because of the confusion it creates, since it would not mean "Active DUTY Reservist," since that's something else entirely. What you are talking about is more usually (And technically) called the Selected Reserve, which is all the TPU, IMA, and AGR personnel, which are all 'Active Reservists' but, except for the AGRs, not on 'Active duty' except when on AT or mob orders (Weekend drills are not 'Active duty' for the TPU and IMA people, they are 'Inactive duty for training' or IADT). Almost all provisions of the UCMJ require the jurisdictional language 'On active duty,' cutting out prosecution of anyone besides the AGRs unless the person is on AT, ADT, ADSW, or mob orders. The State military codes
may be a little broader when it comes to offenses like unauthorized absence or missing movement for what would be IADT time, though they would be only 'Unsatisfactory participation' admin offenses from the Federal point of view since the "On active duty" element of the offense could not be met.