JMac Customs 1913 Adapter for MP5K and Clones Hardcoat Anodized Black. 7076 T6 aluminumhard coat/black anodized1913 milspec railincludes choate bufferadjustable cheek wieldallows attachment of pistol bracesinstalls using factory pinsfits MP5K clones (will not fit reverse stretch)Attaching a stock to a pistol creates an SBR all NFA rules and regulations apply.Will not work with collapsible PDW style stocks or braces Specifications for JMac Customs 1913 Adapter for MP5K and Clones: Manufacturer: JMac Customs Condition: New Color: Black Gun Make: Kalashnikov Gun Type: Rifle Fabric/Material: 7075-T6 Aluminum Mount Type: AK Mount Features of JMac Customs 1913 Adapter for MP5K and Clones 1913 Adapter for MP5K and Clones Package Contents: JMac Customs 1913 Adapter for MP5K and Clones JMac Customs RSA-MP5K: 1913 Adapter for MP5K and Clones Hardcoat Anodized Black