German WW2 ZB26 & ZB30 Antiaircraft Sight Set : Front & Rear NATION IMA has a few of

IMA has a few of these early Armstrong-type explosive shell projectiles

After the War

Below copy is courtesy of martinihenry

configuration and dimensions of all the features

We call that last item a screwdriver nowadays

German WW2 ZB26 & ZB30 Antiaircraft Sight Set : Front & Rear NATION IMA has a few ofOriginal Item: In WW2, one of the taskings of the light machine gun was to provide antiaircraft fire, and most countries provided special sights for this purpose. The front sight of the pair was typically a spider sight, so called because of its resemblance to a spider web. The rear AA sight may be a separate device that attaches to the receiver, or it may simply be the regular rear sight, set at an assigned elevation angle for use with the front