Stockpiling of this weapon is continuing. The 38 M weapons, early capability design, have been retired from the stockpile, 21. Mark 9 (280 mm artillery-fired atomic projectile). Artillery projectiles of regular production quality are being stockpiled, . A test of this weapon, fired from the 280 mm gun, is Planned at Nevada in the spring of 1953. Weapon Component Production and Conversion pELETED DOE AZCHIVES 23. Initiator vroduction. Production of polonius 210 ini- tiators for poth implosion and gun-type weapons continued on schedule. 24, prs 2/ Weapon production facilities.—~ Construction of the Pantex 2rdnence Plent, fmerillo, Texas, and the expansion of the Iowa Ordnance Plant, Burlington, Iowa, were completed and the