Strike Industries Modular Fixed Stock FDE One Size. Using the included set of shims you can lengthen or shorten these AR15 Stocks from Strike Industries. Strike Industries Modular Fixed Stocks can be used with a monopod and fit solidly so your stance will be more consistent with each shot. Using just a Phillips head screwdriver and an Allen wrench you can easily install the Strike Industries Adjustable Length Fixed Stock on a new build or a work in progress. Specifications for Strike Industries Modular Fixed Stock: Manufacturer: Strike Industries Buffer Tube Size: Mil-Spec Gun Model: AR-15 Additional Features: None Length: 8 in Condition: New Gun Type: Rifle Weight: 14.8 oz Fabric/Material: Polymer Features of Strike Industries Modular Fixed Stock Customizable Length of Pull (12" to 14.25") Modular assembly Snap Hook attachment and sling loop For milspec carbine or their Advanced Receiver Extension 7Position buffer tubes only. Package Contents: Strike Industries Modular Fixed Stock 1x Strike Modular Fixed Stock 3x Adjustment Shims (0.75") What firearm models does the manufacturer say Strike Industries Modular Fixed Stock is compatible with? The manufacturer suggests that Strike Industries Modular Fixed Stock is compatible with AR-15Strike Industries SI-STRIKE-MFS-FDE: Modular Fixed Stock FDE One Size