Windham Multi-Caliber Rifle Kit 5.56/.300 AAC Blackout/7.62x39mm/9mm 16" Barrels

Windham Multi-Caliber Rifle Kit 5.56/.300 AAC Blackout/7.62x39mm/9mm 16" Barrels
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$2,971.00 $2,152.49
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Manufacturer Number:
223 Remington
300 Blackout
Unit of Measure:
AR-15 Rifles
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Four calibers in one AR platform rifle. Change from 5.56mm NATO (.223) to .300 AAC Blackout to 7.62x39mm to 9mm. Simply change out barrels, magazine wells and, if necessary, the bolt/bolt carrier and magazine. Barrels are chrome-lined and machined from 4150 Chrome Moly Vandium steel finished in black manganese phosphate (except 9mm is Melonite finished and not chrome-lined). Receivers are CNC machined from forged 7075 T6 aircraft aluminum and finished in hardcoat black anodize. Bolts are machined from Carpenter 158 steel. MCS flat top upper receiver with integral, railed free-float forend and designed for easy barrel change. Includes 1913 railed gas block, bayonet lug, sling swivel and A2 flash hider. MCS lower receiver with telestock. Includes one standard magazine for .223/.300 and one Magpul AK type magaine in 7.62x39, plus one 9mm Colt-type. All barrels are clearly stamped with appropriate caliber markings. Ships in a heavy duty, custom die cut, foam-lined, lockable rifle case.
  • Barrel Length : 16
  • Caliber : 5.56mm NATO/.300 AAC Blackout/7.62x39/9mm
  • Capacity : 30
  • Item Description : WWE RMCS-4 556/300/762/9 16 30
  • Tactica : Tactical
  • Caliber-Gauge : .223 REM.
  • Long Gun Web Model : Model RMCS

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This purchase comes with the Impact Guns Lifetime Warranty  (Read More)


Estimated shipping times are posted on the product information page under the title "Ships On Or Before:" please note that all lead-times are estimates.  For items in our warehouse, we usually ship within 3 business days.  For items only available at distribution or other sources, the ship time may be up to 10 business days.  For items only available at the manufacturer, the lead-time may be a few weeks or longer-- depending on availability.

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Non-Returnable Items:

Due to safety, legal, and regulatory reasons, our return policy does not apply to the following items:

  • firearms (including any serialized items ex. lower receivers)
  • black-powder guns
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Also, if a firearm is not picked up from the destination dealer, the customer is responsible for the return shipping charges and a 6% restocking fee.

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