From MSM article link above (and reposted below), it sounds like CS bought the two guns in January, around the time that KA found out about the relationship between CS and MW from the fall. See below, BBM.
MoriahWilson, 25, was the leading gravel racer in the U.S., having only just turned professional. She was murdered in Austin on May 11. The girlfriend of a male cyclist has been charged with the murder.
www.dailymail.co.uk
Strickland and Armstrong got back together shortly after his fling with Wilson but
his girlfriend only found out about the one-week dalliance in January.
The
Austin American Statesman reported that Armstrong 'became furious and was shaking in anger,' according to a tipster who spoke with police.
<snipped>
Armstrong allegedly told the tipster that she wanted to kill Wilson and that she had either recently purchased a firearm or was going to, according to the affidavit, obtained by
Fox 7 Austin.
<snipped>
Strickland told police that he purchased two 9mm handguns for him and Armstrong around this time.