Geissele 15" Super Modular Rail MKI Black
The Geissele Super Modular Rail MK1 (SMR) was developed as a
side project to a rail R&D project Geissele was working on for one of our
larger customers. Our SMR MK1 is designed to fit the M4 Carbine and all
mil-spec AR-15 variants. The SMR MK1 does a good job in meeting the ten design
specifications for a good M4 weapon rail.