HK partnered with Umarex of Germany to bring you the HK416 .22 LR pistol. Featuring a RIS- Rail Interface System M-LOK/Mil Picatinny Rail 1913; retractable stock; pistol grip with storage; adjustable flip up sights; 90 degree manual safety; functional dust cover; last round bolt hold open and a threaded muzzle 1/2" x 28. Compatible with most AR-style arm braces. Get the look and feel of the legendary HK416 used by the worlds most elite fighting forces in a semi-automatic .22 LR rifle. HK partnered with Umarex of Germany to bring you the best, most realistic HK branded rimfire rifles available. Whether you use it as sub-caliber trainer, for hunting or competition, make sure you get the only HK416 .22 LR rifle authorized by HK.