- Rifle, Caliber .30, T1
- Original prototype.
- Rifle, Caliber .30, T1E1
- A single trial rifle that broke its bolt in the 1931 trial.
- Rifle, Caliber .30, T1E2
- Trial designation for gas-trap Garand, basically a T1E1 with a new bolt.
- Rifle, Caliber .30, M1
- Identical to T1E2. Later, the gas port was changed, but the designation did not.
- Rifle, Caliber .30, M1E1
- Modified cam angle in op-rod.
- Rifle, Caliber .30, M1E2
- Prismatic scope and mount.
- Rifle, Caliber .30, M1E3
- Roller added to bolt's cam lug.
- Rifle, Caliber .30, M1E4
- Gas cut-off and expansion system with piston integral to op.rod.
- Rifle, Caliber .30, M1E5
- 18 inch barrel and folding stock, for Airborne and Tank crewman use.
- Rifle, Caliber .30, M1E6
- Sniper variant.
- Rifle, Caliber .30, M1E7 / M1C
- M1E6 with a 2.2 x magnification M73 scope (later modified as the M81). M82 and M84 scopes could be used instead. Scope mounted in a Griffin & Howe mount affixed to the left side of the receiver requiring a leather cheek pad to properly position the shooter's face behind the offset scope.
- Rifle, Caliber .30, M1E8 / M1D
- M1E7 with an M82 or M84 scope. Scope mount was a Springfield Armory mount attached to the rear of the barrel allowing quick removal of the scope. This model required the leather cheek pad also.
- Rifle, Caliber .30, M1E9
- M1 similar to the M1E4, with piston separate from op-rod.
- Rifle, Caliber .30, M1E10
- With the Ljungman direct gas system.
- Rifle, Caliber .30, M1E11
- Short-stroke tappet gas system.
- Rifle, Caliber .30, M1E12
- Gas impingement system.
- Rifle, Caliber .30, M1E13
- "White" gas cut-off and expansion system.
- Rifle, Caliber .30, M1E14 / MK 2 MOD 0
- M1 rechambered in .30 T65 / 7.62x51mm NATO with press-in chamber insert, enlarged gas port, and 7.62mm barrel blushing.
- Rifle, Caliber .30, T20
- Select-fire conversion, capable of using M1918 Browning Automatic Rifle magazines.
- Rifle, Caliber .30, T20E1
- T20 variant using its own type of magazines.
- Rifle, Caliber .30, T20E2
- T20 variant, E2 magazines fit in the T20E2 and BAR, but the the T20E2 can not fit the BAR magazines. Planned to be produced as the M2 Rifle.
- Rifle, Caliber .30, T20E2, HB
- T20E2 heavy barrel variant.
- Rifle, Caliber .30, T22
- Fully automatic select-fire conversion by Remington. This model was magazine fed.
- Rifle, Caliber .30, T22E1
- T22 variant, unknown differences.
- Rifle, Caliber .30, T22E2
- T22 variant, unknown differences.
- Rifle, Caliber .30, T22E3, HB
- T22 variant, stock angled upwards to reduce muzzle climb, and a heavy barrel. This model uses the T27 fire control system.
- Rifle, Caliber .30, T23
- T22E3HB but standard clip fed.
- Rifle, Caliber .30, T26
- 18 inch barrel and standard stock, for airborne and tank crewman use.
- Rifle, Caliber .30, T27
- Remington select-fire field conversion. Ability to convert issued M1 Garands to select-fire rifles.
- Rifle, Caliber .30, T31
- Experimental bullpup variant.
- Rifle, Caliber .30, T35 / MK 2 MOD 2
- M1 Garand rechambered for .30 T65 / 7.62x51mm NATO, used a variant 10-round Sanford internal magazine loaded by 5-round stripper clips.
- Rifle, Caliber .30, T36
- Lightened T20E2 variant rechambered in .30 T65 / 7.62x51mm NATO, using T35 barrel and T25 magazine.
- Rifle, Caliber .30, T37A
- T36 variant, used gas-impingement system and straight stock design.
- Rifle, Caliber .30, T37B
- T36 variant, used gas-cutoff system.
- Rifle, Lightweight, Caliber .30, T44
- Based on the M1, direct successor to the previously tested T37B Rifle.
- Rifle, Lightweight, Caliber .30, T44E2
- T44 with gas-impingement system.
- Rifle, Lightweight, Caliber .30, T44E4
- Final variant of the T44, entered production as the M14.
- Rifle, 7.62mm, M14
- Succeeded the M1 Rifle in design and service.
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