7161302$89.95M2HB Late Style Breech Lock . New Condition. 6008784$8.95M2HB Breech Lock Pin. US GI, NOS. Condition. 731211$899.95Barrel Extension, Browning M3 machine gun, stripped. 7312711-ASSY$799.95Barrel Extension Assembly, Browning M3 machine gun, complete. 600978$49.95Replacement Shank for the M2HB Barrel Extension. US GI, Good Condition. 6008908$19.95M3 Barrel Lock Spring. US GI, NOS Condition. M3 Barrel Extension Browning Machine Gun Parts Search for: Search Showing all 6 results Default sorting Sort by popularity Sort by latest Sort by price: low to high Sort by price: high to low Sort by name: A to Z 600978 Shank, Barrel Extension, M2HB. $49.95 7161302 Breech Lock, Late, M2HB. $89.95 6008784 Pin, Breech Lock, M2HB. $8.95 731211 M3 Barrel Extension, Stripped. $899.95 6008908 Spring, Lock, Barrel, M3. $19.95 7312711-ASSY M3 Barrel Extension Assembly, Complete. $799.95