Aangstad Arms UDP-9
-9mm
-Straight blowback system
-Silencerco 3 prong, threaded muzzle device
-Takes Glock Magazines
-5.5 inch barrel
-Removable brass deflector
-Last round bolt hold open
-Law tactical folder (armorer installed)
-Magpul flip up front and rear sights
-Magpul grip and trigger guard
-Comes with one (1) magazine
-Gearhead Works Tailhook MOD1 pistol brace
This runs perfectly and is NOT picky about ammo. Several brands and grains were fired through this and never had a malfunction.