Well, besides the part where you need to register it as an SBR, don't do the part I bolded. The Glock accessory rail is designed for lights and lasers. It's not designed for foregrips. Watch this guy shoot himself when the rail/dustcover on the Glock he's shooting breaks.Bitter Clinger wrote:Or, you can just keep one of these adjustable stocks that slips into the bottom of the Glock17 grip, add a foregrip onto the front rail, and have a pistol caliber "carbine"...of sorts...without having to carry / secure a long gun...
Having personally shot a couple different machine pistols, I'll say that while a foregrip may look cool, it's actually more awkward than just using two hands on the pistol grip like shooting a normal pistol.