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.300 Blackout Barrels

.300 Blackout Barrels

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Rainier Arms Select 300BLK AR-15 Barrel - 16"

$195.00

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Ballistic Advantage Modern Series 300BLK AR-15 Barrel - 8"

$147.25

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Rainier Arms Match 300BLK AR-15 Barrel - 10.5"

5.0 star rating 1 Review

$260.00

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Rainier Arms Match 300BLK AR-15 Barrel - 14.5"
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4.8 star rating 30319 Reviews

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Verified Reviewer

0.0 star rating

03/25/25

Review by Anonymous User

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03/25/25

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Thomas S.
Verified Buyer

5.0 star rating

03/24/25

Fast shipping

Review by Thomas S. on 24 Mar 2025 review stating Fast shipping
Got exactly what I ordered. Very good deal and happy with my purchase. Would recommend.

On KCI USA AR-15 Polymer Magazine - 30rd (10 Pack)

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03/24/25

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Christopher C.
Verified Buyer

5.0 star rating

03/24/25

Awesome Gas Block

Review by Christopher C. on 24 Mar 2025 review stating Awesome Gas Block
Great item. Love that the adjustment has positive clicks and isn’t just a set screw. Fitment was also great on the new barrel.

On Superlative Arms Adjustable Gas Block Bleed Off - .750 Tan DLC (Limited Run)

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03/24/25

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Christopher C.
Verified Buyer

5.0 star rating

03/24/25

Great Quality

Review by Christopher C. on 24 Mar 2025 review stating Great Quality
Always great quality out of Rainier Arms. Amazing items, fast shipping, awesome customer care.

On Rainier Arms Mountain MOD2 5.56 NATO AR-15 Barrel - 14.5"

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03/24/25

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Silvano U.
Verified Buyer

5.0 star rating

03/24/25

Awesome!!!

Review by Silvano U. on 24 Mar 2025 review stating Awesome!!!
Fits like a glove. Solid workmanship. Performs like a dream!

On Bootleg Mil Spec AR-15 5.56 NATO CamLok (M-Lok) Partial Upper

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03/24/25

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John K.
Verified Buyer

5.0 star rating

03/23/25

Great machining

Review by John K. on 23 Mar 2025 review stating Great machining
Very nice kit for p30. You must install all parts including the sear pin, firing pin block spring, etc. The machining is smoother and polished. Kit definitely makes my p30 trigger smoother and lowered pull weights to ~7DA / 2. 5-3#SA. The reset shortening was less noticeable. Still worth it.

On Grayguns HK P30/P2000 No Safety Short Reset System - DA/SA and LEM Trigger

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03/23/25

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$260.00

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Rainier Arms Match 300BLK AR-15 Barrel - 16"

$260.00

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Rainier Arms Match 300BLK AR-15 Barrel - 8.5"

$260.00

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Rainier Arms Select 300BLK AR-15 Barrel - 8"

5.0 star rating 3 Reviews

$195.00

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V Seven Weapon Systems 300BLK AR-15 Barrel - 5.5"

5.0 star rating 1 Review

$320.10

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Ballistic Advantage Hanson 300BLK AR-15 Barrel - 8.3"

5.0 star rating 2 Reviews

$199.50

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Rainier Arms Select 300BLK AR-15 Barrel - 6.5"

4.5 star rating 4 Reviews

$195.00

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Faxon Firearms Match Series Gunner 300BLK AR-15 Barrel - 9"

5.0 star rating 5 Reviews

$170.20

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V Seven Weapon Systems 300BLK AR-15 Barrel - 6.5"

4.7 star rating 7 Reviews

$329.80

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Ballistic Advantage Modern Series 300BLK AR-15 Barrel - 10"

5.0 star rating 1 Review

$156.75

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Ballistic Advantage Modern Series 300BLK AR-15 Barrel - 10.5"

$156.75

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Rainier Arms Ultramatch MOD2 300BLK AR-15 Barrel - 16" Satin

$400.00

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Rainier Arms Ultramatch MOD2 300BLK AR-15 Barrel - 16" Polished

$400.00

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