Glock Locking Block - Glock 17/17L/20/20SF/21/21SF/22/24/31/34/35/37/40/41

An OEM Glock Locking Block for 3-Pin frames. Compatible with Glock models G17, G17L, G17Gen4, G20, G20SF, G20Gen4, G21, G21SF, G21SF Ambidextrous, G21Gen4, G22, G24, G31, G34, G34Gen4, G35, G35Gen4, G37, G37Gen4, G40, G41 - fits only current models (mid-2002 & later)