The Gen 4 Glock 21 is now a reality.  The Glock 21 is one of the more discussed models from the company:  on the one hand, it gives the shooter 13+1 rounds of the powerful .45 ACP to handle whatever threat may present itself.  On the other hand, the gun is noticeably thicker than other Glock models, creating problems for many shooters with small to medium sized hands.
With the Gen 4 treatment to the model 21, Glock will hopefully satisfy all of their fans who like the cartridge developed some hundred years ago. Â One of the major changes to the Gen 4 pistols is the modular back strap system that allows the owner to custom fit the size of each gun to his or her hand. Â While the “Does size matter?” argument will never go away, Glock has certainly made a credible effort to make the 21 comfortably useable by most shooters.
SayUncle has a picture of what is purported to be the Gen 4 Glock pistol due out in January 2010. The picture clearly shows the interchangeable back straps and new texture on the grip. The magazine release appears larger than the current generation.
The model designation on the slide is slightly changed, adding a “Gen 4” next to the model number.
The photo, if real, also shows the other outward appearances of the pistol to be largely unchanged. The rear slide serrations are typical of the standard Glock pistols, not those of the RTF2 models. The finger ridges on the front of the grip are still there (some hate ’em, others love them).
Previous:  Pistol-training.com is reporting that they received private confirmation of the new Glock models from another industry professional at the National Association of Police Equipment Distributers (NAPED).
So, despite Glock’s statements, someone at the NAPED conference is saying new adjustable grip Glock’s will be rolling out within a year. It makes me wonder if someone let something “slip” at the convention, and Glock is still putting the new models through testing.
If Glock is developing an adjustable grip pistol, and someone did release the information too soon, this puts Glock in a tough position. They could continue to deny the rumor, and hope no one else leaks additional information.
On the other hand, if they were to announce the new pistol now, they would likely be doing so well in advance of the completion of testing and development of the guns. So, announcing and then failing to deliver could create a major PR debacle.
Pistol-training.com’s source puts the roll-out time around the 2010 SHOT Show, which would seem to make sense.