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Tri-Ad locking system
Designed for use in rifles and single action revolvers
the illuminated reticle is independently adjustable for brightness
Fits chests to 54"
Geissele Automatics 05314 Reaction Block Black Steel AR15/M4/M16 Scope Covers and Shades Tri-Ad locking systemThe Geissele Reaction Block is designed to aid in the assembly of lower receivers. Once the armorer has installed the buffer tube, the lower receiver can then be slid into the Reaction Block at the 12, 3, 6 and 9 oclock positions. This allows the armorer to rotate the lower receiver by 90 increments in the block simply by loosening the provided nylon screws, removing the lower receiver and sliding it back in at its desired orientation. The Reaction
