If you look on www.zahal.org there is an awesome Glock shoulder stock ($109) and a fore grip ($?) which turns the almighty full size models, i.e. G17,22,20 etc. into a formidable, carbine in seconds. Add the high capacity magazines, red dot system, and with a strong caliber like 10mm, you have a formidable 150+ meter range weapon that is reliable,powerful enough, extremely light, and very easily hidden. There are videos on there website that shows the system being used in a tactical situation. I love it! The problem is, it becomes a SBR, short barreled rifle when attached and therefore it must be registered with the BATF. However, on YouTube.com, krazy45cat has a 16" barrel from Impulse Gun Barrels in Austria. I can't find the place to order one online. Does anyone know where I can find a 16" barrel? Can I buy the stock and keep it in my home legally but not attach it (until the zombie attack occurs, LoL) ?? I don't like the RONI or HERA type carbine systems. They defeat the purpose of lightweight, minimalist, philosophy Glock was built on. They also add weight and cost a lot more but don't increase the bullet speed like a 16" Barrell will. I could buy a carbine but will it be reliable as a Glock? (no!) It will cost more too!