The 410 carried more than 800 pounds of armor, mostly in and around the cockpit. AS others have pointed out, the cockpit floor was armored with metal, and so was the "flank" panels of the nose next to the armored window below the canopy. The pilot's seat and the gunner's side windows were armored along with the rear cockpit wall and parts of the side fuselage to the rear. Bomber-destroyers also had a large armored glass shield protecting the front canopy. Bomb bay and guns were armored and so was the ammo bin in the rear fuselage. Radiators and other vital components were also armored.
Our 410 seems to be lacking much of this armor.
As for the effectiveness of WWII armored glass. WWII armored glass usually comprised of multiple layers of hardened glass with thin transparent acetate sheets between. The Germans also used this type of armored glass on their tanks. German ace and all-round great guy Franz Stigler was shot in the face at point blank range while attacking a B-17. The .50 cal penetrated his armored windshield, but only had enough energy left to get stuck in Stigler's forehead. After the war he would point to a dent in his forehead and say "this is where the Americans shot me in the head".
The armored windshield of a 109G:
