Geissele AR15/M4 Reaction BlockMil-Spec Buffer Tube Only 05-314. 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 o'clock positions. This allows the armorer to rotate the...
Geissele AR15/M4 Reaction BlockMil-Spec Buffer Tube Only 05-314. 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 o'clock positions. This allows the armorer to rotate the...