I have four P-042 magazine extensions for the 12 round S&W magazines, and four of the P-043 extensions for the 15 round S&W magazines. All are new, unused in package. Price is $6.00 each shipped, four for $20.00 shipped, or all eight for $40.00 shipped. Payment by Pay-Pal or money order. First reply and PM gets their pick and on from there. Make sure you put in your reply how many of which you would like so others will know.