Choate Tool H&K 91 Adj. Folding Stock223. This stock is adjustable from 14 1/4 inches to 15 1/4 inch length of pull using our spacer system. This lets smaller stature shooter or officers wearing body armor to have a weapon that is better fitted to their needs. This stock uses the same quick open steel housing and folding arm that all of our H&K stocks use. Will fit the HK 91 . These stocks have our life time warranty but are built tough enough so that you never have to use it. Specifications for Choate Tool H&K 91 Adj. Folding Stock: Manufacturer: Choate Tool Gun Type: Rifle Gun Make: Heckler & Koch Gun Model: Heckler & Koch HK91 Country of Origin: USA Features of Choate Tool H&K 91 Adj. Folding Stock Adjustable length of pull spacer system. Steel folding mechanism. Glass filled polymer stocks Package Contents: Choate Tool H&K 91 Adj. Folding Stock What firearm models does the manufacturer say Choate Tool H&K 91 Adj. Folding Stock is compatible with? The manufacturer suggests that Choate Tool H&K 91 Adj. Folding Stock is compatible with Heckler & Koch HK91Choate Tool CMT-15-01-12: H&K 91 Adj. Folding Stock223