Two Groove Barrels

[jjroth]

for substitute standard rifles, e.g.: 1903's & 1917, but high Stadard (HS) made small run of four grooves for 17's (??)

M1's were specified for four-groove only.

Any barrel presented as a M1, MUST be carefully examined as some characters would bore out shot-out M1 barrel an turn down and sliver solder a 03 two-groove in place.

DO NOT FIRE, this barrel configuration.