This title may seem a bit strange to most as most are looking for ways to increase magazine capacity thus the reason for choosing certain firearms to begin with. Please bear with me as I try to explain. I have a Glock Model 21SF that I truely love. I think it is a great handgun. I have hunted Whitetail Deer with Single Shot Speciality Handguns since 1982. In all those years I have used a variety of different open sighted handguns as sort of a back up weapon for close range work in thick cover where a scoped single shot would not be the best choice etc. I am have been contemplating either using +P .45 ACP Ammo and or converting the Glock 21SF to .45 Super to enable me to shoot some of the various Buffalo Bore offerings in .45 Super. My problem and the reason for this posting is as follows. South Dakota law states that for a Cartridge to be legal for Handgun Hunting Whitetail Deer it must be factory rated to produce a minimum of 500 FtLbs of Energy at the Muzzle (several +P offerings meet this requirement as well as .45 Super offerings). However the other part of the South Dakota law states that for an Autoloading Cartridge to be legal for use in South Dakota for Hunting of Whitetail Deer it must only be capable of holding 6 cartridges. In talking with my local Conservation Officer (who is a good friend of mine) he tells me that if I can permenantly modify a couple Glock 10 round magazines to only hold 5 rounds (and only have those modified magazinese in my possession while hunting) I would meet the magazine capacity requiement. My question is simply what would be the best easiest method of let's say modifying a 10 round Glock Model 21 Magazine to only hold 5 rounds (5 rounds plus one in the chamber would meet the 6 round capacity requirement)? Sorry for being long winded. Thanks for any and all replies. Larry Wanna kill these ads? We can help!