Relatively small sized, light weight, high velocity military service cartridges like the ×39mm allow a soldier to carry more ammunition for the same weight compared to their larger and heavier predecessor cartridges, have favourable maximum point-blank range or "battle zero" characteristics and produce relatively low bolt thrust and free recoil impulse, favouring light weight arms design and automatic fire accuracy.  Tests measured the free recoil energy delivered by the ×39mm AK-74 rifle at J ( ft·lb), compared to J ( ft·lb) delivered by the ×39mm in the AKM. 
RS Regulate mounts come in two halves, the lower with 300x numerical designation and an upper with abbreviated letters. The lower is available for different lengths and various types of side-rails, including the Yugo style, PSL, M10 rail and even for the Czech Vz 58 (not an AK). The uppers come as either flat-top rail or optic specific direct mount bases. The RS Regulate system is fully adjustable for sight centering and eye-relief. All the RS Regulate mounts are machined from aircraft-grade aluminum and use a high-strength titanium alloy center bolt for the QD locking lever.
The famous AK 47 Rifle was developed by Mikhail Kalashnikov and was accepted for Russian Military service in 1947. AK represents Avtomat Kalashnikova, they were first produced by the Izhevsk Arms Factory. The AK47 Assault Rifle was designed to be simple, reliable, and easy to manufacture. The AK operating system is gas operated with a rotating bolt, known for loose tolerances that perform well in dirty and harsh conditions. The AK Rifle has matured into several different models including the AKM and AK 74 Rifles just to mention a few. Fielded in over 100 countries and adopted by 55 different nations. The legendary reliability of the AK 47 design and system has made it a favorite of US recreational shooters and collectors for many years. Atlantic Firearms offers the widest selection of AK 47 for sale and also feature AK Pistols , AK Shotguns and other Kalashnikov AK47 . We offer top Quality Kalashnikovs to meet your AK47 Price and needs.