Seems like Stick has all the Magpul lowers.
AR-15 UBR STOCK COLLAPSIBLE CARBINE LENGTH MAGPUL
Magpul UBR Stock for AR-15/M16
Spikes Tactical.Loading that magazine is a pain! Get your Magazine speedloader today! http://www.amazon.com/shops/raeind
Magpul UBR rifle stock
G&P M870 Goliath High Power Airsoft Shotgun - Magpul PTS UBR Stock / Dark Earth, Airsoft Guns, Airsoft Shotguns - Evike.com Airsoft Superstore
My latest creation: Armalite AR-10 A4 Magpul UBR Stock Magpul MBUS F/R Sights Magpul Angle Grip Troy Extreme BattleRail 13.8" YHM Phantom 7.62 Flash Hider
Magpul UBR Stock in Multicam from SXW $299.00