The Super Modular Rail (SMR) MK4 M-LOK are purpose-built and feature integrated M1913 picatinny rail sections at the fore of the rail in the 3, 6 and 9 o’clock positions. It alsofeatures Geissele’s proprietary 2″ long barrel nut.
-21%
Geissele Automatics 05-283B Su
$188.50 Save:$52.00(21%)
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