90 mm Magazine Plate Upper PartsPlease use the diagrams below as a reference, parts shown in these diagrams are available below. Please Call to Order Escapement Spring - AL158 $5.65 Please Call to Order Knife - AL153 $10.50 Please Call to Order Brush Bolt - AL150B $0.85 Please Call to Order Escapement O-Ring - AL168 $3.15 Please Call to Order Small Pivot Pin Lock Nut - TF212 $0.25