[Bundle] 10% OFF - Weapon Outfitters Custom 5.56mm 13.7 In Complete Upper Receivers


Full Details & Specifications

[Bundle] 10% OFF - Weapon Outfitters Custom 5.56mm 13.7 In Complete Upper Receivers



NOTE:  Only In Stock Items will be Visible when you are browsing the selections!


The 13.7" Barrel was first popularized by Noveske Rifleworks to pair with their "Flaming Pig" KX3 muzzle device.  When pinned and welded to the barrel, the KX3 let the 13.7" barrel achieve an overall length (OAL) of 16.1" inches, meeting the ATF's guidelines on minimum legal barrel length.  

With some personal ingenuity from a former 18-Series-turned-contractor pal, we found the B.E. Meyers 249F Flash Hider also worked with 13.7" barrels to meet the minimum OAL!  With that, we found that a carbine equipped with a high performance muzzle device that met the absolute minimum for barrel length would almost feel and handle like a short barreled rifle in terms of balance and weight. 

The 13.7" format has since been increasingly in use as "go-to" gun for many enthusiasts, whether it's for duty or sport.  Subsequently, the 14.0" barrels from Ballistic Advantage also fill this niche role with several of the muzzle devices offered in this bundle.   

This Custom Configuration is based around 13.7"barrel, a really long muzzle device (Noveske KX5, Dead Air Flash Hider, or B.E. Meyers 249F, etc.) and rail systems 10.0 - 13" in length.  

Our Guarantee:

  • We've curated a selection of only premium parts from the most trusted manufacturers
  • Our expert gunsmith will assemble your upper and execute one of the cleanest pin/welds in the businesss 
  • 100% Satisfaction Guarantee
  • Secure and insured shipping*:  if it doesn't arrive in perfect condition, your purchase is protected
  • 10% off the regular price in addition to any current sales or other discounts
  • 2-3 weeks from order to your doorstep

If you are not as familiar with the different parts and accessories we offer as you'd like to be, or just want a second opinion on a component, reach out to info@weaponoutfitters.com or call (425)968-8444.  We'll be happy to help get you into the right build.

How To Start:

We have stripped down the parts selection to make this bundle simpler than before.  Only In Stock Options are visible to reduce visual clutter.  Onlly one of each item per build.


*Note on Shipping:  Insured shipping with signature confirmation is required by our company; both to protect your investment and guarantee safer handling by carrier services.  Due to our gunsmith's workload, we can not expedite customer builds, so 2-3 weeks is the same no matter if you elect expedited shipping or not. 

Adding this item to the cart negates the regular shipping charge ($5) in favor of the insured shipping rate.  You will not be charged twice on shipping unless you add another product outside of this bundle to the cart.  If you would like other items outside of this bundle delivered to you before 2-3 weeks. we suggest placing a separate order to receive those items sooner.  

Shipping Restriction ITAR/Export Restricted
Gas System Carbine Length
Weapon Model AR15/M16
Operation Direct Impingement
Barrel Length 13.7 Inch
Caliber 5.56x45mm
Material No
Material Finish No
Color No
Mil-Spec/Mil Issued Equipment Yes


Customer Reviews

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Overall Customer Rating

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Posted by Sean | (Posted on 11/20/2018)

Roy was gracious enough to go through the trouble of sourcing the Triarc barrel in my build which was previously not available in the past. WO only offers the best brands, and amazing gunsmithing to back it up. I will be recommending there services to anyone I can tell, and can't wait to have future builds through this service.
Should be more than adequate at Slaying Goblins.


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