Slug Plug fits Glock pistols Generation 1-3 Glock models 17, 17L, 19, 20, 21, 22, 23, 24, 31,32, 34, 35, 37, 38 (not for SF models). Grip Plug by LONE WOLF. 

Subdued detailed engraving of original Greek Molon Labe. When the Persian armies demanded that the Greeks surrender their weapons at the Battle of Thermopylae, King Leonidas I of Sparta responded with this phrase. 

Streamlined, understated, subdued look.