Small hole at front, but its not a big deal, so light pipe works even better. 50 beowulf, google it yourself. The item "IDF ZAHAL tactical israeli army reflex sight 21M mafrolight" is in sale since Monday, November 06, 2017. This item is in the category "Sporting Goods\Hunting\Scopes, Optics & Lasers\Other Hunting Scopes & Optics".The seller is "slavachertanovo" and is located in Moscow, Moscow. This item can be shipped worldwide.