![]() Gas pistons were unmarkedĮxcept by the subcontractors who manufactured them for Inland Mfg. Gas pistons remained unchanged throughout production. Right: Later Gas Piston Nut, countersunk to allow more piston movement Not toīe confused with BI marked barrels manufactured by Brown-Lipe-Chapin for Inland (see below).Īrrows indicate openings for securely staking the gas piston nut to the gas cylinder Note: BI marked gas piston cylinders were manufactured by B & P Motor Company for Inland. The subcontractors were assigned different markings. Inland also subcontracted a number ofĬompanies to manufacture additional gas piston cylinders. Inland manufactured their own gas cylinders, occasionally marked II or I-I. Gas cylinders having the name Rock-Ola were used only on Rock-Ola barrels. With the exception of Rock-Ola, prime contractors did not place their entire name on their Swaged gas cylinders were normally manufactured by the company who manufactured the barrel. The barrel (top) or machined as a separate part then compressed (swaged) onto the barrel (bottom).Ĭut-away showing Swaged Gas Cylinder pressed onto barrel and gas port drilled through gas cylinder and barrel ![]() ![]() ![]() The gas cylinder was machined integral with Gas cylinders were manufactured by one of two methods. Government have 4 lands and grooves.Ĥ lands and grooves, shown from chamber end of the barrel 30 Caliber Carbine barrels manufactured under contract to the U.S. *measured from the muzzle to the end of the skirtĪll.
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