Otis Rail Riser (for use with TRS-74)

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Otis Rail Riser Features: - Compatible with most piston operated systems - Rail nut with offset inner hole provides clearance for proper operating rod/rail fit - Additional barrel nut and wrench for anchoring of barrel against upper receiver - Alignment pin for accurate rail nut piston hole and upper receiver gas tube hole alignment - For exclusive use with Otis TRS Quad Rail