M37 Dual Feed Barrel Extension, Stripped. US GI, NOS Condition.

Breech Lock. Dual Feed. US GI, NOS Condition.

Accelerator/Breech Lock Pin. US GI, NOS Condition.

7.62mm Barrel Lock Spring, M1917, M1919, M37, IMI. New Condition.

.30 cal. Barrel Lock Spring. US GI, NOS Condition.