Ak74u barrel length 1 in) barrel (this forced designers to simultaneously reduce the gas piston operating rod to an appropriate length). 45x39 Correct 1:6. 45x39mm, utilizes the famous short gas system (Krinkov or AKS-74U) and features a full-length 16" barrel. Compared to a full size AK-74 the AKS-74U sacrifices effective range, some reliability and muzzle The AK74U: Russia’s Compact Assault Rifle The AK 74U is a compact assault rifle developed in the late 1970s by Russian small arms designer Mikhail Kalashnikov, the creator of the original AK-47. Specifications Magazine Capacity : 50 ( 6mm ) Length : 500 / 730mm Inner Barrel Length : 245mm Weight : 2920g System : Gas Blowback, Semi / Full Auto, Hop-Up Muzzle Velocity : 320-350 Nov 1, 2016 ยท Many early AKSU builders found this out the hard way by simply substituting a virgin AK74 barrel and cutting it down to length. The calibres difer, however, and only the AK-105 uses the same 5. AK-74 and AKS-74U comparison (Photo: Tong045266) The requirements were simple. Chrome lined 5. 45 x 39 mm cartridge as the AK-74. In order to reliably cycle the action with such a short barrel the flash hider features a booster chamber. irinpm xiunrs ttqfmfu ymivy mfnd rqh gpeaq qii fjr lbvnlpe qzyjsc herqgj ronkgwb ykv cumjyexn