Daniel Defense Extended Picatinny Base for Delta 5 Pro

Product Description

The Daniel Defense Extended Picatinny Base for Delta 5 Pro, part number 03-088-09490, is a receiver-mounted extended Picatinny scope base sold by Daniel Defense for the Delta 5 Pro bolt-action rifle. It replaces or supplements the rifle’s standard optic mounting surface with a longer Picatinny rail so that large variable power scopes can be positioned correctly on the action.

The reason extended bases exist is eye relief. Modern long-range scopes are long, heavy and have large turret housings, and a short receiver-length rail often leaves you choosing between correct eye relief and having both rings on solid metal. A base that carries the rail forward moves the usable envelope ahead of the ejection port, so the scope can sit where your head naturally goes rather than where the rail forces it.

This page asserts no dimensions for part number 03-088-09490. We will not print a cant figure, a slot count, a length, a material or a screw specification that we cannot tie to 03-088-09490, because a precision rifle base is precisely the wrong place to guess. Call 817-393-4000, give us the part number, and we will confirm the specifics against the part before you order.

Key Facts

• Brand: Daniel Defense
• Model: Extended Picatinny Base for Delta 5 Pro
• SKU / Manufacturer Part Number: 03-088-09490
• Type: Receiver-mounted extended Picatinny scope base
• Intended rifle: Daniel Defense Delta 5 Pro
• Manufacturer: Daniel Defense
• Confirm by phone before ordering: overall length, number of cross slots, built-in cant, material, finish, weight and mounting hardware — call 817-393-4000

Choosing the base before you choose the rings

Order of operations saves money here. Decide on the scope first, because its tube diameter, objective size, length and turret housing dictate everything downstream. The base then determines how far fore and aft the rings can travel, and ring height has to clear the objective bell while still allowing a repeatable cheek weld. Buying rings before the base is how shooters end up with an optic mounted too high to use prone. Our scope rings and mounts and scope mounts pages carry the ring options, and the Daniel Defense range covers the rest of the brand’s hardware.

Fitting a base to a precision rifle

Receiver bases are fitted with action screws through the base into the receiver, and three things decide whether the install holds: correct screw length so nothing protrudes into the action, clean degreased threads, and the manufacturer’s torque figure applied with a torque driver rather than a hex key and optimism. A base that shifts under recoil shows up as a group that walks, and it is easy to blame the ammunition for weeks before checking the mount.

Ordering from Western Sport in Roanoke, TX

Western Sport has held an FFL since 2007 and is an SOT dealer and Daniel Defense master dealer in Roanoke, Texas, with a gunsmith who works on precision rifles as well as carbines. Call 817-393-4000 and we will confirm fitment against your rifle before anything is ordered.

Frequently Asked Questions

Q: What does an extended Picatinny base do on a Delta 5 Pro?

A: An extended base carries the Picatinny rail further forward than a flush receiver rail, which buys you room to slide a long scope back and set correct eye relief without running the rear ring off the receiver. On a bolt gun shot from a bipod, that fore-and-aft range makes a large optic usable.

Q: Will this base fit a standard Delta 5 rather than a Delta 5 Pro?

A: Do not assume it will. Daniel Defense treats the Delta 5 and Delta 5 Pro as distinct rifles, and receiver-mounted bases are cut to a specific action footprint and screw pattern. Call 817-393-4000 with your rifle’s exact model before ordering, and we will confirm whether part number 03-088-09490 is the correct base for the action you own.

Q: Does this base have built-in MOA cant for long range shooting?

A: We are not going to state a cant figure we cannot stand behind, because that number decides whether you can dial to distance or run out of elevation. Call 817-393-4000 and we will confirm the actual cant, slot count and length of part number 03-088-09490 before you order.

Q: What rings or mount do I need on top of this base?

A: A Picatinny base needs Picatinny rings or a one-piece ring mount sized to your scope’s main tube, so the next decision is tube diameter: 1 inch, 30mm, 34mm or 35mm. Ring height then has to clear the objective bell and suit your cheek weld. Give us the scope model on 817-393-4000 and we will size rings to it.

Q: How is the base fitted to the rifle?

A: Receiver bases fit with action screws into the receiver’s factory holes, and the details that matter are screw length, thread pitch and torque. Too long a screw can bind the bolt; too little torque and the base moves under recoil. Confirm the hardware and torque spec with us before fitting.

Q: Can Western Sport confirm exactly what this base is before I order?

A: Yes, and that is the right way to buy it. Call 817-393-4000 and give us part number 03-088-09490. We will confirm material, finish, length, slot count, cant and the mounting hardware against the part rather than a description. We would rather have that conversation than have you fit the wrong base to a precision rifle.

Additional information