SENTRY MANUFACTURING GASLOCK CHARGING HANDLE CQB FOR AR-308/SR25 The Sentry Manufacturing DEADLOCK Charging Handle brings the company's proven GASLOCK™ technology to the AR10/SR25 platform, delivering enhanced reliability, strength, and shooter comfort. Its patent-pending dual-locking system helps prevent unintended charging handle movement caused by gear snags, reducing the risk of malfunctions in demanding environments. Built around an independent dual-latch design, the DEADLOCK remains operational even if one wing is damaged, while balanced actuation forces provide smooth, consistent manipulation from either side. The advanced gas-management system features a patented hard-stop gas key channel and full upper-receiver-encompassing high-shelf geometry to significantly reduce gas blowback to the shooter. Constructed from 7075-T6 aircraft-grade aluminum and finished with MIL-SPEC Type III hard-coat anodizing, the DEADLOCK is engineered for exceptional durability, corrosion resistance, and long service life.