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The Geissele Automatics 05283B, extensively known as the Super Modular Rail (SMR) MK4 M-LOK, is specifically crafted for advanced functionality. It comprises M1913 picatinny rail sections situated at the front of the rail, discernible in the 3, 6, and 9 o'clock positions.
Adding to its standout features is Geissele's exclusive 2" long barrel nut, further enhancing its overall excellence.