F5 MFG CZ Bren 2 ACR Modular Stock System w/ Adapter FDE 3in x 6in x10 in. The stock chassis and adapter are CNC-machined from billet aluminum 6061 using advanced 5-axis machining centers ensuring unmatched strength and long-lasting performance. Specifications for F5 MFG CZ Bren 2 ACR Modular Stock System w/ Adapter: Manufacturer: F5 MFG Gun Type: Rifle Gun Make: CZ Stock/Brace Material: 6061 Aluminum Length: 10 in Features of F5 MFG CZ Bren 2 ACR Modular Stock System w/ Adapter Material: Built from high-impact Nylon 6-30percent polymer with a durable rubber butt pad for optimal comfort and recoil control. Adjustability: Features seven telescoping positions with an adjustable length of pull from 11 inches to 14 inches allowing for a fully customizable fit. Folding Mechanism: Side-folding to the left with a reinforced hinge detent providing secure lockup in both open and folded positionsideal for compact transport and rapid deployment. Package Contents: F5 MFG CZ Bren 2 ACR Modular Stock System w/ Adapter F5 MFG F5-ACR-CZB-FDE: CZ Bren 2 ACR Modular Stock System w/ Adapter FDE 3in x 6in x10 in