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Warning : Always check and make sure the firearm is unloaded before attempting any modifications

Recommended tools:

- Handguard Removal tool
- Hex Key (included in every Monstrum Tactical AR-15 Drop-In Quad Rail Handguard package)

1) Remove the stock plastic handguard using the handguard removal tool by applying downward pressure to the delta ring. The delta ring is spring loaded and should compress downward, allowing for removal of the handguard.

The first step to installing a quad rail is to remove the existing hand guard

 

The first step in installing a quad rail is removing the existing hand guard

2) Remove the hex screws from the Monstrum Tactical Drop-In quad rail, separate the quad rail into two halves.

Next you take apart the Monstrum Tactical quad rail into 2 pieces

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AR-15 Quad Rail Handguard - Carbine Length | Drop-In | Black

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AR-15 Extended Quad Rail Handguard with FSP Cutout | Carbine Length | Drop-in

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AR-15 Quad Rail Handguard - Carbine Length | Drop-In | Flat Dark Earth

$ 24.95

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AR-15 Quad Rail Handguard - Carbine Length | Drop-In | Olive Drab Green

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3) Using the handguard removal tool, hold the delta ring down and place the lower half of the quad rail handguard in place.  The tapered end (the end with the inward curved lip) of the quad rail should point toward the receiver.  The tapered end of the quad rail should tuck inside of the delta ring. 

Next install the top portion of the quad rail onto your rifle

4) Place the top half of the quad rail into place making sure the two halves fit together.  On the front end, the two halves of the quad rail should fit into place around the circular front end cap.

Installing the bottom half of the Monstrum Tactical quad rail

5) Using the provided hex key and screws, tighten the two halves of the quad rail to each other.  The two halves do not come together completely.  Screw together until the top and bottom halves both tighten securely around the circular end cap.  The quad rail should now be held in place against the front sight post by the tension created from the delta ring, and further stabilized by the four set screws.

Use the included hex screws and key to firmly attach the 2 pieces together

6) Attach any Monstrum Tactical rail covers or accessories (optional). Installation of Monstrum Tactical rail covers in Flat Dark Earth is shown below.

Add on any accessories and rail covers to your quad rail



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