2-Hole Accessory Rail for Geissele HK SMR Designed specifically for use with Geissele HK Super Modular Rails (SMR). This 1913 Picatinny spec rail section allows the attachment of various 1913 Picatinny spec rail-mounted accessories such as lights, vertical grips, etc. Machined from milspec-anodized aluminum. 3 Slots. 3-Hole Accessory Rail for Geissele HK SMR Designed specifically for use with Geissele HK Super Modular Rails (SMR). This 1913 Picatinny spec rail section allows the attachment of various 1913 Picatinny spec rail-mounted accessories such as lights, vertical grips, etc. Machined from milspec-anodized aluminum. 7 Slots. Mfg: Geissele Automatics