CSM TRI RAIL HANDGUARD INSTALLATION(H&K MP5 .22LR umarex)
This guide details the installation of a CSM Tri-Rail handguard onto a Umarex licensed HK MP5 .22LR. The process involves removing the faux suppressor and original handguard by unscrewing four bolts with a 5/64" Allen key, then sliding on the new handguard and reassembling the front sight and faux suppressor. A crucial step includes remembering to replace the small rubber washer on the barrel.











