The Midwest Industries Side Folder with Stock Tube is for use with firearms that have a picatinny attachment. The side folder can be adjusted to fold either to the right or left. A modular design can accommodate different stock assemblies. FeaturesHeavy-duty side-folding mechanism constructed from 4140 steelFull-length locking lug for maximum strengthSolid positive lock up in both positionsSteel clamp with large surface engagementModular design can accommodate different stock attachmentsFeatures a Mil-Spec diameter aluminum stock tube that is hard coat anodized (1.145 Diameter)Stock tube features waterproof storage compartmentAdds 7.375 inches to overall firearm lengthAdds 0.75 inches to the firearm in the folded positionSteel parts are mag phosphate finishedNote: This product is not for use with firearms with buffer assemblies. Perfect for 22 LR conversion builds or other applications where a reciprocating AR-15 buffer is not required.