NOTICE: Regarding fit of CCU to early generation GLOCK 17s

As quoted from the Mech Tech Systems Inc. website.

Fit Alert: It has recently come to our attention that certain older G17 frames will not fit our Glock CCU. We do not as yet have a complete handle on just what serial number range is involved but to date most such lowers have 'KY' at the beginning of their s/n's. There is an easy fix for this for those daring enough to consider a simple mod to the frame. The guilty feature is a non-functional plastic flash near the metal rail tabs. This flash can be removed with a pocket knife and is of no consequence to the proper function of the pistol. This flash interferes with insertion of the lower into our CCU. Check with Mech-Tech customer support or a competent gunsmith for details.

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