Gun hider BookKASE model SM with covers for either Pending Storm, Any Given Moment, or Best Recipes This BookKASE model SM will will hide most all small to medium semi-autos up to 4 5/8 barrels as well as 2 snub nose revolvers up to .357 cal. Ultimate concealment when it counts. Hidden in plain sight for your security needs when common firearm cases, holsters and safes are simply out of reach or too obvious. The custom protective inlay is made from MR3, a hydrophobic material that will not absorb or draw away the protective oils from your firearm. Modifications can be made to fit aftermarket sights, lasers etc. Simply trim protective material to fit need. BookKASE is designed to be on its side or stand vertically between other books on a bookshelf. The bottom of the cover is trimmed flat with the pages to offer support for the weight of your concealed protection.