The G-Block requires no permanent changes to your lower. With the included cutting guide, Glock magazines* can be altered to interface with any milspec AR15 magazine catch in under a minute. TorkMag’s G17 magazines are also compatible out of the box with AR mag catches. Each kit ships with polymer magwell blocks mated to a steel fixed ejector, a mag-cutting guide, and a hex key for press fitting the magwell blocks in position.
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