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Title:	CARBINE -  U.S. CARBINE M1 .30 SN# 5202157
Maker/Manufacturer:	INLAND DIV. OF GM-SPAR
Date of Manufacture:	1944
Eminent Figure:
Catalog Number:	SPAR 1749
Measurements:	OL: 89.6CM 35 3/8" BL: 45.7CM 18"

Object Description:

U.S. CARBINE M1 .30 SN# 5202157
Manufactured by Inland Division of GM, Dayton, Oh. in 1944 - This was a standard M1 carbine which has been modified experimentally. The stock at the left side of the receiver has been cut for a very long and experimental fire control lever which is now missing. The left side of the stock is deeply routed with A and S indicating automatic and semi-automatic fire positions. Weapon has adjustable rear sight, heavy bolt, and bayonet lug. The experimental device, a "Code GE", is no longer attached to weapon. (GE = Gaidos Selective Fire Converter.) Complete with 15-round detachable box magazine. Weapon manufactured in 1944 at a cost of $30 to the government.

Markings:
Receiver: U.S. CARBINE/CAL. 30 M1. INLAND DIV./5202157.
Barrel: INLAND MFG. DIV./GENERAL MOTORS/8-44.

Notes: "SUMMARY: The 'CODE GE' Converter was subjected to a 5000 round endurance test, a dust test, a mud test, a wet test, a cold test, and the launching of a grenade. The device performed satisfactorily throughout all the testing with no malfunctions attributable to the converter. Based on data obtained in this test, the 'CODE GE' Converter would be a satisfactory attachment to convert the Carbine Caliber .30 M1 to full automatic fire.
DESCRIPTION: The 'CODE GE' Selective Fire Converter consists of three units; namely, a Control Plate containing the necessary parts to operate the sear, an Actuator which is the connecting link between the Control Plate and the gun operating slide, and the Housing which retains the two other units in proper position.
A slight modification of the standard M1 carbine stock is also necessary, in that a relief cut is made along the left side to accommodate the actuator.
The principle on which the converter operates is as follows: Assume the gun is loaded and the hammer is cocked. When the trigger is pulled, and not released, as for full automatic fire, the sear is tilted by the rear portion of the trigger, releasing the hammer and firing the chambered round. At the same time the trigger is pulled, the rear portion of the trigger also contacts the lower rear of the sear depressor, pivoting it on the control plate, so that the forward end of the depressor is tilted downward, not far enough to contact the sear, and the opposite upper end is tilted upward. With the selector lever in the automatic position the disconnector is positioned in such a manner that it contacts the upper rear of the sear and being connected to the actuator, it will move to-and-fro, and being connected to the actuator, it will move as soon as the front face of the operating slide contacts the actuator adjusting block on counter recoil. This forward movement pulls the disconnector hook against the upper projection of the sear depressor which in turn further tilts and disengages the sear from the sear notch in the hammer at the instant the operating slide returns the piston to its proper firing position in the gas cylinder.
With the selector lever in the semiautomatic position the disconnector is raised, thus preventing contact between the hook of the disconnector and the rear upper projection of the sear depressor.
CONCLUSIONS: It is concluded that from the data obtained in the test of 'CODE GE' Selective Fire Converter, this device would be a satisfactory attachment to convert the U.S. Carbine Caliber .30 M1 to full automatic fire, with minor modifications.
Recommendations: It is recommended that a more suitable means of locking the actuator block to the actuator be considered. While this would be a minor modification, it is now possible that failure of full automatic fire could result if the holding screw loosened up sufficiently to allow the actuator block to become disengaged from the actuator.
It is also recommended that the 'CODE GE' Selective Fire Converter be subjected to tests in the subzero temperature of the cold room at the Armory. The cold room is now under construction and probable completion is anticipated around the first of April 1949." - SA-MR-2-1001.

Test device designed by Alonzo Gaidos, Redw
References:
SA-MR2-1001 - FUNCTION TEST OF 'CODE GE' SELECTIVE FIRE CONVERTER FOR THE U.S. CARBINE CALIBER .30 M1, L. Spaulding, 18 January 1949.