Shadow Systems Extractor Depressor Plunger Assembly. Compatible with Glock 17, 19, 22, 23, 24, 26, 27, 31, 32, 33, 34, 35, 37, 38, 39 and Shadow Systems' MR918 pistol all models and MR920 without an optic cut. FeaturesMachined 17-4 Stainless Steel Extractor Depressor PlungerExtractor Depressor Plunger SpringSpring Loaded Bearing DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.