Glock Trigger Housing Pin Polymer No MBS (Gen4/5 SF G30S G36 G36FGR G19X G44 G45 & G45 MOS). This black polymer trigger housing pin is compatible with Glock SF Models G30S G36 G40 Gen4 G19X and all Gen4 and Gen5 model pistols without modular backstraps chambered in 9mm 10mm .40 S&W .45 ACP .380 Auto and .357 SIG. This solid short pin is a direct factory replacement for your worn or damaged pin made to the same high standards in material and workmanship as the parts that originally came in your Glock firearm.