TM 9-1275

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Serviceability Chart - Rifles, U.S., Cal. .30, M1, M1C, & M1D

Item

In The Hands Of Troops

To Accompany Troops Overseas

To Be Placed In Storage For Reissue

Finish

Exposed surfaces should be dull enough to prevent glare

Intact enough to prevent glare

Approximate new finish

Stock

Not damaged to the extent that will affect strength

Seasoned checks, small dents and insignificant cracks are acceptable

Approximate appearance of new stock. Should be sanded and refinished if necessary. Patch work and reinforcing that does not affect strength is acceptable

Hand Guards

Not damaged so as to affect strength. Looseness when assembled to the rifle is acceptable

Seasoned checks and cracks which are not critical points are acceptable. Looseness when assembled to rifle is acceptable

Seasoned checks and cracks which have been reinforced by pins are acceptable. Looseness when assembled to rifle is acceptable

Bore

Pitting less than the width of land or groove and less than 3/8" long is acceptable

Fine uniform pitting but with sharp lands is acceptable

A few fine pits but with sharp lands are acceptable

Breech bore

Max 0.310

Max 0.306

Max 0.305
Use gage 41-G-28

Barrel Dia.
(outside)

Min 0.5995
Use gage 41-G-236

Min 0.5995
Use gage 41-G-236

Min 0.5995
Use gage 41-G-236

Gas Cylinder
Diameter
(inside)

Max 0.5320
Use gage 41-G-198-425

Max 0.5320
Use gage 41-G-198-425

Max 0.5320
Use gage 41-G-198-425

Headspace

Min 1.940
Max 1.950
Use gage 41-G-200-130

Min 1.940
Max 1.950
Use gage 41-G-200-130

Min 1.940
Max 1.946
Use gage 41-G-200-100

Piston Diameter

Min 0.525

Min 0.525

Min 0.525

Trigger Pull
(Rifle M1)

Min 5-1/2 lb
Max 7-1/2 lb

Min 5-1/2 lb
Max 7-1/2 lb

Min 5-1/2 lb
Max 7-1/2 lb

Trigger Pull
(Rifles, M1C & M1D)

Min 4-1/2 lb
Max 6-1/2 lb

Min 4-1/2 lb
Max 6-1/2 lb

Min 4-1/2 lb
Max 6-1/2 lb

Firing Pin Protrusion

No check

No check

Min 0.044
Max 0.059
Use gage 41-G-182-350

TM 9-1275

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