Daniel Defense RIS II Screw Pack

Product Description

The Daniel Defense RIS II Screw Pack is the 1.2 oz set of replacement rail screws required to install a MK18 RIS II or M4A1 RIS II handguard – four long socket head rail screws, two short socket head rail screws, and six flat head rail screws with washers.

These screws come with the purchase of a complete rail system, so this pack is only necessary if you damaged or misplaced your original parts. That covers the usual cases: a RIS II bought used with no fasteners, a screw head stripped by a worn bit, or a rail that left something on the bench during a barrel change.

Order the correct pack rather than improvise. Daniel Defense rail fasteners are military specification, with Grade 8 fasteners specified on several of its rails, and the RIS II is a two-piece rail whose alignment depends on those screws holding their torque.

Key Facts

• Brand: Daniel Defense
• Model: Rail Interface System II (RIS II) Screw Pack
• Manufacturer Part Number / SKU: 01-004-30050
• Fits: MK18 RIS II and M4A1 RIS II handguards
• Pack contents: 4x long socket head rail screws, 2x short socket head rail screws, 6x flat head rail screws with washers
• Weight: 1.2 oz
• Purpose: replacement for original screws that have been damaged or misplaced
• Thread sizes, screw lengths, material, finish and torque values: call 817-393-4000 to confirm

Screw pack or hardware pack?

Both exist for the RIS II and they are not the same order. This screw pack is fasteners only; the RIS II Hardware Pack carries the same screws plus the Bolt-Up System barrel nut and the RIS II bolt-up plate. The RIS II itself is the two-piece rail Daniel Defense is sole source provider of to United States Special Operations Command, designed at SOCOM’s request for the SOPMOD II program. Also worth a look: our rail and handguard accessories, our rails and handguards, and the wider upper receiver parts section.

Ordering from Western Sport in Roanoke, TX

Western Sport, Roanoke, Texas: licensed FFL/SOT since 2007 and a Daniel Defense master dealer, so we order single small-parts packs direct rather than sending you to a forum classified. These are on backorder; call 817-393-4000 and we will get it placed.

Frequently Asked Questions

Q: Which handguard do these screws belong to?

A: They are the replacement rail screws required to install a MK18 RIS II or M4A1 RIS II handguard. That is the fitment: the two RIS II handguards. A DDM4 Rail, SLiM Rail or Lite Rail III uses different fasteners and a different pack, which we list separately.

Q: What is in the pack?

A: Four long socket head rail screws, two short socket head rail screws, and six flat head rail screws with washers, at a total weight of 1.2 oz. That is the screw complement for a RIS II installation rather than a single fastener, so you keep spares afterwards.

Q: Do I need this if I am buying a complete rail system?

A: No. These screws come with the purchase of a complete rail system, so the pack is only necessary if you damaged or misplaced your original parts. That is why it exists as a part number – a RIS II arriving second-hand without its fasteners is common.

Q: What is the difference between the screw pack and the RIS II hardware pack?

A: The screw pack is the fasteners on their own. The RIS II Hardware Pack adds the Bolt-Up System barrel nut and the RIS II bolt-up plate to the same screw complement. If your barrel nut and plate are present and sound and only screws are missing, the screw pack is the correct, smaller order.

Q: Will these screws work on a RIS III?

A: Do not assume so. The RIS III is backward compatible with the RIS II Bolt-Up System and uses the same barrel nut and bolt-up plate, and its upper rail is fully compatible with the RIS II lower rail – but this pack is specified for MK18 and M4A1 RIS II handguards. Call 817-393-4000 with your rail and we will confirm.

Q: Why not substitute a hardware-store screw of the same size?

A: Daniel Defense rail fasteners are military specification, with Grade 8 fasteners specified on several of its rails. A soft substitute deforms or shears under the torque a rail joint needs, and a sheared screw inside a handguard is a drilling job. Replacing the screw properly is much cheaper.

Additional information