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Proof Research

Proof Research - Carbon Fiber Barrel Blank - .204 Cal - Sendero Contour

Starting at

$899.00

or 4 ×   with Sezzle

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Ships straight to your door. No FFL transfer required for this part.
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Free Shipping Over $199
Easy Returns 30 days
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Not sure it fits? Call 1-970-242-6166 — you’ll talk to an expert who works with these parts every day.

Upgrade your rifle with Proof Research Carbon Fiber Barrel Blank! Made with aerospace-grade carbon fiber, it offers lightweight, high-performance precision.

Goes with this

Complete the build

Overview

A .204 Sendero carbon fiber blank, ready for your gunsmith to chamber

This Proof Research .204 Sendero blank is a carbon fiber wrapped 416R stainless barrel, sold unchambered and unthreaded for your gunsmith to finish. The 22" finish length comes with a 1:10 twist for the .204 bore.

Up to 64% lighter than steel

Proof rates a carbon fiber Sendero at up to 64% lighter than a steel barrel of the same contour. The 22" blank weighs 3 lb 2 oz.

1.200" shank, 2.50" long

The shank runs 1.200" in diameter for 2.50" from the breech, then tapers to 1.0625" at 5.50" and 1.030" at 10". Those are the numbers to check against your stock's barrel channel.

1:10 twist for the .204 bore

Our single .204 variant is 1:10 twist at 22 inch finish length.

Cut rifled 416R core

Proof starts with a match-grade 416R stainless blank, cut rifled with a single-point tool and lead lapped, turns it down, then wraps it in aerospace-grade carbon fiber with a resin from its own composites division. The wrap moves heat along and through the barrel wall, and Proof claims no point-of-impact shift during high-volume fire.

Steel at both ends

The 2.50" breech section and the last .800" at the muzzle stay solid stainless, so there is steel to thread for the action and for a muzzle device. Extra stock beyond the finish length is left on for the gunsmith to remove.

Limited lifetime warranty

Proof warrants the barrel against defects in material and workmanship for the original owner. The warranty card must be on file with Proof within 30 days of delivery.

Specifications

Bore and rifling

Caliber.204
Twist rate1:10
RiflingSingle-point cut, lead lapped
Steel coreMatch-grade 416R stainless
WrapAerospace-grade carbon fiber, Proof ACD resin

Sendero contour (measured from the breech face)

Shank diameter1.200"
Shank length2.50"
Taper begins3.14"
Diameter at 5.50"1.0625"
Diameter at 10"1.030" (typical end of a stock forearm)
Steel muzzle section.800"
Extra stock at the breech.100", removed by the gunsmith
Extra stock at the muzzleRemoved by the gunsmith

Muzzle diameter by finish length

22".943"

Weight by variant (Proof's figures)

22", 1:103 lb 2 oz

What ships

ConditionBarrel blank: drilled, rifled, contoured and inspected
ThreadsNone; sent to your gunsmith
ChamberNone; sent unchambered
Breech section2.50", solid steel, ready to thread
Muzzle section.800", solid steel; extra stock left for the gunsmith

Fitment

Will it work with your build?

Works with

  • Bolt actions, once your gunsmith threads the 1.200 inch shank to the action's tenon
  • .204 bore cartridges, chambered by your gunsmith

Will not work with

  • Any rifle as shipped: it is an unthreaded, unchambered blank

Your gunsmith must thread, chamber and crown the blank. The muzzle section and the extra stock at the breech are provided for the gunsmith to remove and work with. Rifle barrels ship for a flat $14.95 per order, regardless of quantity, and do not qualify for free shipping due to their size and handling requirements.

Detail

Fitting it and the fine print

What does the gunsmith do with it?

The blank arrives unthreaded and unchambered. Your gunsmith will thread the breech for your action's tenon, chamber it to your chosen cartridge, crown the muzzle, and remove the extra stock we provide at the muzzle and breech. The blank is already rifled, so the gunsmith is finishing, not boring.

Will it fit my stock's barrel channel?

The Sendero contour is 1.200 inch in diameter for the first 2.50 inches from the breech, 1.0625 inch at 5.50 inches and 1.030 inch at 10 inches, per Proof's contour drawing.

Caliber
.204
Contour
Sendero
Twist
1:10
Length
22"
Shank
1.200" x 2.50"
Condition
Blank (unthreaded)

Works with

  • Bolt actions, gunsmith fitted
  • .204 bore cartridges

Will not work with

  • Any rifle as shipped

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Shipping

Free same day shipping

Most orders over $199 ship free. We ship same day on all in-stock orders received before 14:00 Mountain Time. Free Shipping orders use standard ground and typically deliver in 1 to 4 days. Excludes international orders, Alaska and Hawaii, and select oversized items. All orders valued over $1,000.00 ship signature required.

Overnight & expedited shipping

If you need an item fast, cost-effective expedited options are available at checkout. Most expedited orders ship via FedEx or Overnight Mail.

Local customers

We are in 2317 Grand Park Dr Unit 2B Grand Junction, CO 81505 and we stock every item we sell. We love seeing customers and encourage you to stop by — just leave a comment in the order notes during checkout.

International shipping

We ship to international shoppers in 82 countries registered with EasyExport®. Registration is free and EasyExport does not share your information, and you can register before or after you shop. See International Export for details.

Returns

Not quite perfect? Red Hawk will make it right, no matter what. Guaranteed. Most items have a 30-day window from the day the product was delivered to you. Excluded are ammo and ORM-D products, custom ordered items, items not in original condition, and international orders. Every item we sell also carries a manufacturer warranty, and we only work with manufacturers who stand behind their products.

Read the full shipping and returns policy

Common questions

How do I know the items I'm buying are compatible?

Check the Fitment section above — it lists what this part works with and what it does not. If you are still unsure, call 1-970-242-6166 or use the chat icon at the bottom right of the page — our team builds precision rifles with these parts every day.

Where are you located?

2317 Grand Park Dr Unit 2B Grand Junction, CO 81505. We ship every single order from our own warehouse and take pride in being part of our local hunting and competition shooting community.

I can't find the configuration I need — can you special order it?

Absolutely. Call 1-970-242-6166.

What if there is an issue with the product I ordered?

We will make it right, no matter what. We only carry products from top-tier manufacturers who stand behind them.

Which items need to ship to an FFL?

Only serialized firearm actions and receivers require an FFL transfer. Barrels, stocks, triggers and accessories ship straight to your door.

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