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Super Modular Rail MK4 M-LOK

Super Modular Rail MK4 M-LOK

The Geissele Super Modular Rail MK4 (SMR) was designed as an ultra light weight rail system for the M4 Carbine and all mil-spec AR-15 variants. The SMR MK4 was designed to do a good job in meeting the ten design specifications for a good M4 weapon rail with an emphasis on weight reduction.

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