Parts and Components

• Buttstock Ammo/Magazine Pouches
• Multipurpose Slings (aka Tactical Slings)

Disclaimer:  I'm not one to convert a rifle into a "Captain Kirk" gizmo-laden monstrosity.  In fact I find it humorous how often people people will be coerced into purchasing a new shiny gizmo by the marketer's use of the words "tactical" and "special forces".  Some may take offense to my tongue-in-cheek perspective, to which I say "Lighten Up, Francis"...  :) 

(extra points if you know from which movie that quote originated).

I do, however, believe that there are some utilitarian additions that anyone can add to their "rig" which will enhance, and not hinder, their loadout.  Most of the advantages offered should be self-evident.

Buttstock Ammo/Magazine Pouches

Multipurpose Slings (aka Tactical Slings)

Photo of a factory ? 3-point AK sling:

Image of an MP5 employed with an "Aussie Style" sling grip.  This is a common configuration for AK pistol builds.  The weapon is pushed forward when fired to provide semi-rigid stability:

Various Aftermarket Slings

Polish Beryl components and magazines

Russian Patent Drawings of Quad-Stack Magazine and Follower:

Russian Prototype "Pan" style 5.45x39 Drum: