Machined from a billet of Aerospace grade stainless steel, the Apex Glock Failure Resistant Extractor (or G-FRE) boasts a more robust extractor claw and improved geometry to produce the most durable extractor available today. The Apex Glock extractor spring provides extractor tension to allow the extractor claw to engage the rim of the cartridge appropriately in order to ensure correct extraction and feeding. FitsGen 3 Models Glock 17 (G17), Glock 17 (G17L), Glock 19 (G19), Glock 34 (G34)Gen 4 Models Glock 17 (G17), Glock 19 (G19), Glock 34 (G34)Gen 5 Models G17, G19, G19x, G34, G45 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.