F5 MFG Gen 2 Picatinny Rail ACR Modular Stock System w/ Adapter Black 3in x 6in x10 in. The stock chassis and adapter are CNC-machined from billet aluminum 6061 using state-of-the-art 5-axis machining ensuring unmatched strength and craftsmanship. Specifications for F5 MFG Gen 2 1913 Picatinny Rail ACR Modular Stock System w/ Adapter: Manufacturer: F5 MFG Gun Type: Rifle Finish: Cerakote Stock/Brace Material: 6061 Aluminum Length: 10 in Weight: 5 oz Features of F5 MFG Gen 2 1913 Picatinny Rail ACR Modular Stock System w/ Adapter Enhanced 7-Position Telescoping & Folding Stock Material: High-impact Nylon 6-30percent polymer with a rubber butt pad for enhanced comfort and recoil absorption. Adjustability: Seven-position telescoping stock with an adjustable length of pull from 11 inches to 14 inches for a customizable fit. Folding Design: Left-side folding with a reinforced hinge detent locking securely in both open and closed positions for compact storage and rapid deployment. Optimized for Optics & Shooting Comfort Adjustable Cheek Riser: Raises up to 1/2 inch for improved sight alignment with optics. Enhanced Shooting Stability: Ergonomic design ensures a superior shooting experience with increased control. Versatile Sling Attachment Options Integral webbing loop for standard sling attachment. QD coupler slots for ambidextrous sling mounting. Single-point sling loop for added flexibility in tactical setups. Package Contents: F5 MFG Gen 2 1913 Picatinny Rail ACR Modular Stock System w/ Adapter F5 MFG F5-ACR-1913-BLK: Gen 2 1913 Picatinny Rail ACR Modular Stock System w/ Adapter Black 3in x 6in x10 in