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GLOCK CARBINE CONVERSION UNIT One of these is the starting point to design your customized Glock Carbine Conversion Unit (CCU). Each base model comes with a 6″ Standard Rail and Molded Fore Grip. If you have your own M4 stock, buffer tube, castle nut and lock ring, our M4 Adapter will accept both commercial and Mil-Spec tubes. Every unit is test fired before it ships.
| Brand | Mechtech |
|---|---|
| Caliber | 9mm luger |