Mud Test: Arsenal SLR104 (AK74) & Valmet M76
This guide outlines a procedure for conducting a firearm mud test, as demonstrated with the Arsenal SLR104 and Valmet M76. It details the steps from initial firing to mud application, malfunction analysis, and post-test cleaning. The expert analysis highlights how mud ingress into the locking lug recesses can cause AK-pattern rifles to fail, even high-end variants with tighter tolerances.











