Fixed blade front and folding adjustable rear ladder and peep sights. The receiver is marked "No. 4MK1 F (FTR) 48" over the serial number. The muzzle is fitted with a clamp on Mk. 5 grenade launcher with a fixed post sight and flip up ladder sight graduated from 25 to 100 yards. The stock socket is dated "1944". Full length stock and handguard set with trapdoor brass buttplate and canvas web sling.