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Introducing The A.R.M.S.® #50™ M-CV S.I.R.® System

• Entire S.I.R.® front end can be installed in less than 5 min. directly to the std. barrel nut without Delta ring. Totally Free Floating.
• Front sight, gas tube, and front handguard retaining cap do not need to be removed.
• Barrel does not have to be removed.
• Standard barrel nut does not need to be removed or replaced.
• Perfect alignment with the receiver can be accomplished via built in alignment anti-rotation locking tabs.
• No special tools required, S.I.R.® std. sling swivel is useable for installation.
• The system only weighs 8.6 oz. The weight will increase depending on what selective rails are chosen to be utilized plus the weight of the sling swivel.
• Handguard complete with Q.D. indirect air flow heat shield.
• The S.I.R.®’s selective rails at the 3, 6 and 9 o’clock positions can be exchanged, repaired or replaced without removing the top main top rail.
• Super cool offset heat venting.
• The optional S.I.R.® rail also provides a modular means to cost effectively upgrade into future integral electronics, and provide a solid platform, can eliminate the need to use high less stable mounting devices, plus protects the top of the aluminum receiver at the same time protecting the receiver; can eliminate replacement of a damaged receiver.
• The #50™M-CV allows the M203 launcher to be free float attached with no modification whatsoever to the launchers receiver.
• The #50™M-CV allows the A.R.M.S.® dual Q.D. 1913 M203 attachment brackets to install to the SIR upper handguard just like the polymer handguard.
• The #50™M-CV launcher Q.D. attachment brackets provide a built in 1913 dovetail rail along the length of the handguard at the 3 and 9 o’clock positions, for multiple position attachment of grenade launcher sights.

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