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Rainier Arms

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Handgun Barrels

Pistol barrels and barrels for your handgun.

Agency Arms Sig P320 Compact Premier Line Threaded Barrel

$310.00 - $310.00
Starting at 0% APR or $57.22/mo with . Learn More

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Agency Arms Sig P320 Compact Premier Line Barrel

$300.00 - $300.00
Starting at 0% APR or $55.37/mo with . Learn More

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Agency Arms Sig P320 Compact Mid Line Barrel

4.5 star rating 4 Reviews

$200.00 - $200.00
Four Payments of $50.00 with . Learn More

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L2D Combat Precision Match Sig Sauer P320 Compact 9MM Barrel - Fluted

4.3 star rating 4 Reviews

$146.92 - $149.99

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True Precision Sig P320 Compact 3.9" Non-Threaded Barrel

$180.49 - $199.49
Four Payments of $49.87 with . Learn More

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True Precision Sig P320 Compact 3.9" Threaded Barrel
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4.8 star rating 30639 Reviews

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Verified Reviewer

0.0 star rating

07/07/25

Review by Anonymous User

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07/07/25

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Ricky B.
Verified Reviewer

5.0 star rating

07/06/25

Great barrel at a great price!

Review by Ricky B. on 6 Jul 2025 review stating Great barrel at a great price!
Don't be nervous to pull the trigger on this barrel. I've got over 1000 rounds of ammo through my 18" ultramatch fluted. It prints sub 1" MOA groups consistently when fed with at least 62gr NATO. With 77gr (particularly 77gr SMK bullets) you can get closer to sub . 5" MOA. Barrel is about as light as a rifle length barrel gets while retaining this type of rigidity and resonance period (yes including proof research / other boutique barrels. I noticed that cold bore shots vs a warm gun had a smaller deviation than that of other 16" / 18" barrels that I have shot with. Bottom line, if you're building an accurized ar15, this will meet or beat your expectations.

On Rainier Arms Ultramatch MOD2 .223 Wylde AR-15 Barrel - 18" Polished

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07/06/25

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Mike p.
Verified Buyer

5.0 star rating

07/06/25

Looks good works well

Review by Mike p. on 6 Jul 2025 review stating Looks good works well
Seems to help with rise and recoil. Shoots much better than with just a flash supressor. Wish it had threads for a can on the outside, but two out of three ain't bad. Also priced well.

On Rainier Arms Xtreme Tactical Compensator (XTC) 2.0 .308/7.62 Muzzle Device - Black Nitride

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07/06/25

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James C.
Verified Buyer

5.0 star rating

07/05/25

Rainier Arms is Number 1

Review by James C. on 5 Jul 2025 review stating Rainier Arms is Number 1
Great Product. Great Service and fast shipping at a great price.

On KNS Precision .154 Non-Rotate Trigger / Hammer Pin MOD ST

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07/05/25

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David P.
Verified Buyer

5.0 star rating

07/04/25

choosing the best!

Review by David P. on 4 Jul 2025 review stating choosing the best!
I have two of the Maxim Defense CQB in black I've met the owner & several people that work at Maxim, all of there products are top notch. Great stock & great pricing from Rainier Arms Thank you!

On Maxim Defense CQB Gen 7 Stock for AR-15 - FDE

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07/04/25

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Jonathan K.
Verified Buyer

5.0 star rating

07/02/25

Great product

Review by Jonathan K. on 2 Jul 2025 review stating Great product
Fit perfectly on my Mac 5. No complaints.

On Lee Sporting Aluminum MP5 / SP5 / HK Clone Lower Housing - Full-Size Push-Pin

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07/02/25

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$199.49 - $218.49
Four Payments of $49.87 with . Learn More

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Agency Arms Sig P320 Compact Mid Line Threaded Barrel

5.0 star rating 4 Reviews

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Danger Close Armament DCA-320 Select Match 9mm Barrel For Sig P320 - (3.9")

5.0 star rating 1 Review

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Agency Arms Sig P320 Compact Premier Line Threaded Barrel - SS

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$310.00
Starting at 0% APR or $57.22/mo with . Learn More

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