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Command Arms Accessories Picatinny Quad Rail Fits AR15/M16 Aluminum Black Oxide Finish XM4S has been discontinued by CAA and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Weapon Accessories yourself to try and find the perfect replacement for you!
Achieves superior zero retention and repeatability by having the upper three rail section mount underneath the end cap and is held secured in place with a friction fit ledge secured with roll pins. Receiver end is secured to the barrel with a barrel nut bracket that is attached to the upper three rail section with four captive flathead screws. Bottom rail also has a friction fit ledge to keep it securely mounted to the end cap and it secures to the receiver with a retractable spring loaded piston and yoke system. Top rail creates one long monolithic rail with the existing flat top rail. Slots around the rails provide maximum ventilation around the rails.CNC machined from aviation grade aluminum to MIL-1913 standards with a hard anodized black oxide finish. Requires Delta Ring removal.![]()
| Mfg Item Num: | Â XM4S |
| Type: | Â ACCESSORIES - GUN ACCESSORIES - HANDGUARDS |
| Model Header: | Â XM4S - 2 Point |
| Master Model Header: | Â Picatinny Quad Rail Handguard- AR15/M16 |