| Model 4, Model 15 |
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| UTG PRO Model 4/15 Carbine Length Quad Rail System - Black | | MTU001 |
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| UTG PRO Model 4/15 Carbine Length Quad Rail System - OD Green | | MTU001G |
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| UTG PRO Model 4/15 Carbine Length Quad Rail System - ACU | | MTU001R |
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| UTG PRO Model 4/15 Rifle Length Quad Rail System - Black | | MTU003 |
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| UTG PRO Model 4/15 Mid Length Quad Rail System - Black | | MTU007 |
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| Model 4/15 Rifle Length Quad Rail System | | MNT-T416L |
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| Model 4/15 Free Float Rifle Length Quad Rail System | | MNT-T416LF |
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| Model 4/15 Mid Length Quad Rail System | | MNT-T416MA |
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| Model 4/15 Free Float Mid Length Quad Rail System | | MNT-HG416MF |
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| Model 4/15 Carbine Length Quad Rail System | | MNT-T416S |
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| Model 4/15 Carbine Length Quad Rails with Free Float Extension | | MNT-T416SE |
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| Model 4/15 Free Float Carbine Length Quad Rail System | | MNT-HG416SF |
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| 0.5" High 2-Slot Low-Profile Super Compact Riser Mount | | MNT-RS05S2 |
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| 0.5" High 3-Slot Low-Profile Compact Riser Mount | | MNT-RS05S3 |
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| 0.83" High 2-Slot Med-Profile Super Compact Riser Mount | | MNT-RS08S2 |
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