A – D

annealed_receiverAlso Lead Pot Annealed. A process used to soften the rear of the receiver to prevent cracking when struck by the bolt during recoil. After the development of the grenade launcher, a new steel alloy less prone to cracking was used to make receivers. Older receivers were dipped in molten lead to reduce brittleness. This process darkened the appearance of the dipped section, resulting in “two-tone” receivers.
arrowheadA style of receiver logo used on the earliest International Harvester rifles, in which the arrangement of the text lines resembles an arrowhead. Collectors believe these were supplied by Springfield Armory and are among the very first rifles produced by IHC.
baseProperly “bracket”; the dovetail base fastened to the receiver of the M1C Sniper rifle. The telescope and mount slide onto the bracket. See M1C.
birchThe wood used to make replacement stocks and handguards in the late 1950′s. Original specifications called for walnut, but difficulty in obtaining it resulted in a switch to birch in some rebuild programs and for replacement guards.