F5 MFG Modular Stock System with B&T 9mm Adapter Black. Taking the modular concept one step further the MPS allows the shooter to not only customize the stock to their needs but also makes for a great mid-length or short-length buffer tubed carbine. A solid locking hinge is built in to both the receiver extensions and the buffer tubes on both the full-size and compact receiver extensions. This allows for the receiver extensions to be pushed in or out without the stock being damaged. The MPS allows for a quick and easy disassembly for travel or storage. This new MKS style stock system will also fit all common AKs making it an even better option for CQB applications. Machined from 6061-T6 aluminum the MPS is designed to be the last AR stock you ever buy. Specifications for F5 MFG Modular Stock System with B&T 9mm Adapter: Manufacturer: F5 MFG Color: Black Stock/Brace Material: 6061 Aluminum Condition: New Features of F5 MFG Modular Stock System with B&T 9mm Adapter B&T Apc9 Compatible Adapter 6061 AL and Nylon 6/6 Polymer Construction Intergrated Locking Hinge Adjustable Cheekwell 7 Adjustable Length Positions 3in Length of Pull Package Contents: F5 MFG Modular Stock System with B&T 9mm Adapter F5 MFG F5-MSSBT9-BLK: Modular Stock System with B&T 9mm Adapter Black