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Rifle kit, 20", A3, BULL STAINLESS

  • Model: AR-RK20V-FFL
  • Shipping Weight: 1lbs
  • 26 Units in Stock


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This COMPLETE PARTS KIT (less stripped lower receiver) has the following standard features:

M4 Feed Ramp barrel extension
T-Marked forged upper receiver
1-9" twist, 6 grooves, right hand
5.56mm chamber (shoot either 5.56mm or .223)
416R Stainless Steel Barrel
Stainless steel finish barrel

This 5.56mm caliber barrel is 20" long with a target crown and a correctly sized gas port for reliable function.  The barrel is machined from 416R re-sulpurized stainless steel and hardened to a U.S. government Mil-spec of Rc 26-32.  All external steel parts are coated in manganese phosphate IAW of Mil-STD-171, the U. S. government's recommended protective finish for steel. This finish not only looks great, it affords complete corrosion protection. These barrels are of BULL contour (.950" under the handguards, .935 under the front sight base, .925" forward of the front sight base).  This contour alleviates barrel whip and enhances accuracy in semi auto fire and helps dissipate heat. The barrel is button rifled with 6 grooves, right hand, 1 / 9" twist.  The 1/9” twist is best because it handles the widest variety of ammunition and bullet weights.

The barrel is mounted on a FORGED A3 upper receiver with built in Mil-spec M1913 Picatinny accessory rail with the correct rail numbers engraved, made from certified 7075T6511forgings, hardcoat anodized IAW Mil Spec A8625, Type III, Class II, black per No. 37038, Table IX with nickel acetate seal, as per the Mil-spec. The upper features a forward assist and hinged ejection port cover.

 The barrel has a hardcoat anodized, machined aluminum, handguard that is knurled for sure grip and good looks.  It completely free floats the barrel for increased accuracy. 

The heavy duty 6 position buttstock comes standard.  The buttstock tube is the mil spec thickness (1.145" OD). This kit comes with this stock (NOT the one in the picture)

All semi auto lower receiver parts are INCLUDED as well as semi auto bolt, carrier, and charging handle. The upper is COMPLETELY ASSEMBLED. Each and every part to the gun is included EXCEPT the stripped lower receiver! (A complete firearm is pictured, the lower receiver, sights, vertical grips, etc. and magazine, even though shown in the picture, are NOT included).

If you would like to upgrade to a FLUTED barrel,  order the upgrade here:

If you would like to upgrade to a threaded muzzle with thread protector, order here:

Don't forget the Mil Spec Aluminum, 30 round magazines:

If you would prefer a Mil Spec A2 (solid) stock, simply order item  "AR-A2buttsub" on the SAME order as this kit. Here is the link:

PLEASE NOTE:  For CHROMED barrel interior and chamber, You must ACTUALLY Order part # AR-CHROME on your web order form, if you do not see it and it does not charge you $50 on your form, you have not ordered it and will not receive a chromed barrel. Do NOT just put it in the special instructions. Here is the link:

Since this parts kit does not include the receiver, no FFL is required. Like all of our AR parts kits, this is MADE IN USA!

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This product was added to our catalog on Friday 21 October, 2016.

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