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Proof Research - Carbon Fiber Barrel Blank - .284 (7mm) Cal - Sendero Light Contour

Proof Research

Proof Research - Carbon Fiber Barrel Blank - .284 (7mm) Cal - Sendero Light Contour

$899.00
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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.

Achieve superior accuracy with the Proof Research Carbon Fiber Barrel Blank in .284 (7mm) Cal. This Sendero Light Contour barrel combines lightweight construction with outstanding performance.

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Overview

A 7mm Sendero Light carbon fiber blank, lightest when every ounce counts

This Proof Research .284 (7mm) Sendero Light blank is a carbon fiber wrapped 416R stainless barrel, sold unchambered and unthreaded for your gunsmith to finish. Choose 18", 20" or 22" finish length and 1:8 or 1:8.4 twist. Proof recommends the Sendero Light contour where lightness and precision matter more than the last bit of stiffness.

Up to 64% lighter than steel

Proof rates a carbon fiber Sendero Light at up to 64% lighter than a steel barrel of the same contour. The 18" blank weighs 2 lb 7 oz, the 20" 2 lb 9 oz and the 22" 2 lb 13 oz.

1.200" shank, 2.50" long

The shank runs 1.200" in diameter for 2.50" from the breech, then tapers to 1.00" at 5.50" and 0.956" at 10". Those are the numbers to check against your stock's barrel channel.

Two twists for the 7mm bore

1:8 and 1:8.4. Proof's rule is that a faster twist (lower number) stabilizes heavier, longer bullets. Check the bullet maker's twist recommendation before you order.

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.284 (7mm)
Twist rate options1:8 or 1:8.4
RiflingSingle-point cut, lead lapped
Steel coreMatch-grade 416R stainless
WrapAerospace-grade carbon fiber, Proof ACD resin

Sendero Light contour (measured from the breech face)

Shank diameter1.200"
Shank length2.50"
Taper begins3.18"
Diameter at 5.50"1.00"
Diameter at 10"0.956" (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

18".878"
20".856"
22".839"

Weight by variant (Proof's figures)

18", 1:82 lb 7 oz
20", 1:82 lb 9 oz
22", 1:82 lb 13 oz
22", 1:8.42 lb 13 oz

What ships

ConditionBarrel blank: drilled, rifled, contoured and inspected
Not doneChambering, threading, crowning, fitting to the action
FittingBy a qualified gunsmith with the proper tools
WarrantyLimited lifetime, original owner, register within 30 days
Accuracy guaranteeNone on a barrel sold alone (Proof guarantees complete Proof rifles only)

Fitment

Will it work with your build?

Works with

  • 7mm cartridges such as 7mm Rem Mag, 7mm-08 Rem, 7mm WSM and 7mm RUM, chambered by your gunsmith
  • Any bolt action, once the shank is threaded to the action's tenon
  • Stocks and chassis with a barrel channel that clears 0.956" at 10" from the breech
  • Lightweight or compact builds: Sendero Light is about 2.5 oz lighter than Sendero at equal length
  • Wildcat 7mm chambers (Proof does not guarantee accuracy, velocity or stability for wildcats)

Will not work with

  • Drop-in or pre-fit installation: this is a blank, not a finished barrel
  • Barrel channels sized for larger contours like Sendero or heavier profiles

This is a barrel blank, not a finished barrel. It ships unchambered, unthreaded and uncrowned, with extra steel at both ends for your gunsmith to remove during fitting. Rifle barrels and barreled actions ship for a flat $14.95 per order and do not qualify for free shipping. Other contours and lengths are available to order.

Detail

Fitting it and the fine print

Sendero or Sendero Light: which contour do I order?

Proof Research recommends Sendero Light when lightness is your priority: every ounce matters, your stock has a tight barrel channel, or you are building a shorter or more compact rifle. The Sendero Light is about 2.5 oz lighter than Sendero at equal length. If you need the stiffness for precision work or a suppressor, choose Sendero instead. Both barrels deliver the same accuracy out of the box; the difference is weight and channel fit.

Which twist rate do I order?

Proof offers the .284 Sendero Light in 1:8 and 1:8.4. Their rule is simple: a faster twist (the lower number) stabilizes heavier, longer bullets, and a slower twist suits lighter conventional bullets. Proof's own advice is to check the bullet manufacturer's twist recommendation for the bullets you plan to shoot.

What does my gunsmith get, and what do they still have to do?

The blank arrives drilled, rifled, contoured and inspected. Chambering, threading the shank to your action, crowning and fitting are all left to the gunsmith, and Proof says installation needs special tools and a qualified gunsmith. Proof's drawing leaves .100" of extra stock at the breech and a stub at the muzzle to be removed during fitting. The 2.50" breech section and the last .800" at the muzzle are solid stainless, so there is steel for the tenon thread and for a muzzle thread if you want one.

Will it fit my stock's barrel channel?

Measure the channel where it ends. Proof gives the Sendero Light's diameter at 10" from the breech face as 0.956", because that is a typical distance from the breech to the end of a forearm. Behind that the barrel is 1.00" at 5.50" and a full 1.200" over the 2.50" shank. The Sendero Light is the lighter of Proof's two main contours; if your channel was sized for a sporter or if you need more stiffness, Sendero or other contours are available to order.

Caliber
.284 (7mm)
Contour
Sendero Light
Twist options
1:8, 1:8.4
Finish lengths
18" to 22"
Shank
1.200" x 2.50"
Ships as
Blank, unchambered

Works with

  • 7mm Rem Mag, 7mm-08, 7mm WSM
  • Any bolt action, gunsmith fit
  • Lightweight builds (2.5 oz less than Sendero)

Will not work with

  • Drop-in or pre-fit use
  • Heavier contour channels

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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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