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A military small & medium caliber ammunition collection

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20 x 110mm HS United States

20 x 110mm HS TP M99A1 United States 20MM M21A1 LC 53 profile view.20 x 110mm HS TP M99A1 United States 20MM M21A1 LC 53 head view.

Details

TypeTP, M99A1
Projectilesteel, aluminum windscreen, black, 1 copper driving band Projectile Markings: (white ink) 20MM TP M99A1 LC-Y-20-3101 Driving Band Markings: ACK 1-11-63 20MM M99A1
Casebrass, choke crimp
Primerelectric, flat, brass, ring crimp, red annulus
Headstamp20MM M21A1 LC 53