Unbreakable urethane vise block takes all the clamping force, so your expensive AR15 lower receiver won't be damaged or distorted.
Insert block into the magazine housing from the top or bottom, then clamp the other end in your bench vise.
The magazine catch locks to the block, safely and securely holding the rifle for assembly, disassembly, cleaning, or repair.
Will not mar or scratch the finish.
Made in USA!