Sako TRG 22/42 Picatinny Fore-end accessory rail, bottom. All steel construction - attachment platform for the Sako TRG22/42 weapon system. This MILSTD-1913 Picatinny rail mounts axially with the barrel center line to the standard rail under the TRG 22 and TRG 42 forend allowing the attachment and use of different accessories. Fore-end rail has a cut out for Allen key, so it is not necessary to remove the accessory rail for forearm disassembly. All mounting hardware included.