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Captrix 300 AAC Blackout Upper

List Price: $495.00
Our Price: $379.00
You save $116.00!


: Usually Ships in 24 to 48 Hours
Product Code: MA300

Captrix 300 AAC Blackout Upper

  • A3 flattop upper with forward assist and dust cover USA Manufactured
  • M4 feed ramps
  • 4140 chrome moly steel
  • 1:8 twist
  • 16" hbar
  • 5/8x24 threaded muzzle
  • Standard birdcage flash hider
  • Rifle length free float quad rail (Could have oval or round cut outs in the quad rail, round is pictured)
  • Carbine gas system

*Does not include bcg & charging handle

All Captrix upper assemblies are head spaced and test fired to ensure safety and efficiency.

Warranty Information:
All Captrix Arms upper assemblies include a Limited Lifetime Warranty. Captrix Arms will warranty all upper assemblies manufactured by Captrix Arms against any and all manufacturer defects in material and workmanship which affect reasonable operation during the lifetime of the upper assembly to the purchaser.

Exceptions include:
Damage or malfunction resulting from accident, negligence, normal wear and tear, misuse or a repair or alteration not performed by Captrix Arms; barrel obstruction; use of ammunition other than NATO and/or SAAMI specification new production ammunition; use of any hand loaded, reloaded, imported or factory re-manufactured ammunition; failure to provide reasonable and necessary maintenance; rust or corrosion; use of replacement parts; any unauthorized repair or any alteration, including of a cosmetic nature, performed on the upper assembly by an individual, organization, company or entity other than Captrix Arms; unreasonable or excessive use of the firearm, including but not limited too barrel & feed ramp wear due to the use of a Slide Fire stock.

Average Customer Review: 5 of 5 Total Reviews: 13 Write a review.

  0 of 0 people found the following review helpful:
300 Blackout upper February 5, 2014
Reviewer: William Gutierrez from Eglin AFB, FL United States  
Had it 2 days after ordering!  Didn't fit on rock river lower but fit my other dpms, stag, and spikes lowers just fine.  Shoots very good groups at 100 yards.  Shot both super and sub sonic ammo fine.  Very nice upper for the price.  Next build will be a 10.5 sbr from Captrix.

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  0 of 0 people found the following review helpful:
Captrix Arms 300 BLK upper February 4, 2014
Reviewer: Lewis Freeman from White Oak, TX United States  
Good experience with the ordering being easy and the shipping fast.  The great price didn't hurt my feelings either.  Can't wait to shoot the new upper.

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  0 of 0 people found the following review helpful:
Excellent deal! December 30, 2013
Reviewer: Ty from Bellevue, WA United States  
Fit and finish was great, price was awesome. Took advantage of the free shipping which made the price even better. Another excellent purchase from Captrix Arms.

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  0 of 0 people found the following review helpful:
My new upper December 30, 2013
Reviewer: Daniel Turpin from Princeton, IN United States  
I am very pleased with the Captrix Arms 300 blackout upper . It fit perfectly with my DPMS lower . It looks great and I'm looking forward to taking it to the range . Shipping was fast . I will shop here again .

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  0 of 0 people found the following review helpful:
300blk upper, 16 inch December 30, 2013
Reviewer: David Doremus from Newport, NH United States  
this is a rare and hard to find item, usually they cost a few hundred more then what captrix will sell you theirs for. i really appreciate it. i've recommended this website to multiple people since i bought this and will more. the shipping was fast, it came a day early. thank you so very much for your great products and pricing.

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AR Upper Assemblies > 300 AAC Blackout