Useful accessories for identifying multiple caliber upper receivers. ASLTR caliber ID MLOk covers
This video addresses the common problem of identifying multiple AR-15 upper receivers by caliber. The presenter introduces ASLTR M-LOK caliber ID markers as a solution to quickly distinguish between different calibers, especially when markings are obscured. The markers are designed to slide into M-LOK slots and display the caliber on a small tab.












