This heavy-duty lower receiver vise block makes assembling your rifle easier, enabling you to safely place it in a vise without distorting or damaging your lower receiver. Fits tightly into most lower receivers, some might require slight filing of the block. Has a provision for the magazine catch for additional retention. Place the other end in a vise and make your assembly hassle-free.
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Stabilizer allowed easy information of all parts to lower receiver
Seems to work well