What kinds of steel are Sentinel Arms Mfg™ brand barrels made from?

Custom made EXmatch™ (Extreme Match) barrels

  • 4140 chrome moly steel
  • 416R stainless steel

Are Sentinel Arms Mfg™ barrels cut or button rifled?

All Sentinel Arms Mfg™ barrels are precision pull-button rifled, hand lapped, and inspected with a bore scope for imperfections.

Do do guarantee accuracy on Sentinel Arms Mfg™ brand barrels?

Yes. These are reliable, durable and extremely accurate barrels. All EXmatch™ barrels come with a sub-MOA guarantee*.

* Sub-MOA guarantee is a 3 round group, 1 inch or less, at 100 yards with quality match ammunition and proper shooting techniques. Bolt must be headspaced to the barrel (16" or longer) by Sentinel Arms Mfg™ in AR type barrels.

What is the lead time on Sentinel Arms Mfg™ brand custom barrels?

In stock barrels ship in 1 to 3 business days. Lead time is usually 8 to 10 weeks on our custom barrels, but can sometimes be longer. Check the listing to see updated lead times.

What is cryogenic barrel stress relief (cryo)?

Cryo is a computer controlled scientific dry cryogenic tempering process which relieves stress in firearm barrels. When we cryo a barrel, it is brought down in temperature to -300°F for 24 hours, utilizing dry nitrogen technology, and slowly brought back up to increasingly higher temperatures in controlled increments.

What are the benefits of cryogenic barrel stress relief (cryo)?

With a cryo'ed barrel, the shooter will see a 50 to 60 FPS increase at the muzzle, less fouling, easier cleaning, up to 50% tighter and more accurate groups, DOUBLE the barrel life, and up to 30% lower core temperature. This is a permanent improvement to your barrel. If you are looking for the ultimate in accuracy and durability, cryo is your best option.

Is there a barrel break in period for Sentinel Arms Mfg™ brand barrels?

Yes. Even with our barrels being hand lapped and range ready, we do recommend a barrel break in procedure.

Click here for complete EXmatch™ barrel break in procedures.

Do you ship internationally?

No. We will only ship within the US and where legal to own.

Can you ship to a P.O. box?

Yes. However, you must select USPS (P.O. Boxes ONLY) for your shipping method. If any other shipping method is selected, shipment of your order will be delayed.

Do you ship from more than one location?

Yes. We ship from multiple locations across the continental US. If your order has products shipping from different warehouses, then the products will be shipped separately. Your order status will be updated to "Partially Shipped" when this happens.

How much does shipping cost?

$19.99 fixed rate shipping on Sentinel Arms Mfg™ brand barrels. All other products will be charged the following flat rates:

  • FedEx Ground - $8.99
  • USPS (P.O. Boxes ONLY) - $11.99
  • FedEx Express Saver - $12.99
  • FedEx 2 Day - $14.99
  • FedEx Standard Overnight - $24.99

Are certain products restricted from being shipped by air (expedited shipping)?

Yes. Expedited shipping is not available for certain products. These restricted products include, but are not limited to:

  • Ammunition
  • Solvents
  • Chemicals
  • Anything under pressure

Any orders containing restricted products that have expedited shipping selected will be shipped ground. There will be no refunds on shipping charges.

Are there product restrictions to certain states?

Yes. Certain products can't be shipped to certain states because of state laws regarding firearms and accessories. To access helpful information on regulations and laws in your state, please click here.

Are the products listed on your site in stock?

Yes. With the exception of our custom barrels, everything listed on our site is in stock. Our inventory is updated throughout the day to help eliminate out of stock products being shown as in stock on our website; however, there may be occasions when an out of stock product is still shown as in stock. If your order contains one of these products, we will refund the cost of that product and ship the remaining balance of your order.

What forms of payment do you accept?

Currently, we accept Visa, Mastercard, American Express, and Discover through our verified merchant account for online purchases. We do not accept mail in orders, phone orders, or PayPal. This is for your protection.

Is my personal and credit card information safe?

Yes. We have 4 separate forms of security to protect your sensitive information, such as credit card numbers, billing/shipping address, etc. If an order fails any of our multi-layer security measures, and is deemed fraud, the order is canceled immediately.

We are also partnered with GeoTrust, utilizing 256-bit encryption, to protect you from fraud.