The G5, a piston-operated AR-15 rifle manufactured in Georgia (the country), entered service in the Georgian Armed Forces earlier this year.
It features a full length quad rail, retractable stock similar in looks to the M4 stock, ergonomic pistol grip and BUIS. The barrel is 14.5″.
Georgia originally adopted the AR-15 intro their arsenal when the US Government supplied them with Bushmaster Carbines as part of a military aid package. Many of these rifles ended up being captured by Russia who, quite successfully, featured them in propaganda photos during the 2008 South Ossetia war.
[ Many thanks to Lionel for the info and photo. ]