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Windham Weaponry's RMCS-4 Rifle offers 4 Calibers in the same AR platform by simply changing out Barrels Magazine Wells and if necessary the Bolt/Bolt Carrier and Magazine. Barrels are Chrome Lined for long wear and easy cleaning (except for 9mm Barrel with a Melonite finish) machined from 4150 Chrome Moly Vanadium Steel finished in Black Manganese Phosphate and rifled appropriately for the intended caliber. Receivers are CNC machined from forged 7075 T6 Aircraft Aluminum and finished in Hardcoat Black Anodize. Bolts are machined from Carpenter 158 Steel. The key to barrel interchangeability is on the underside of the MCS Upper Receiver (shown left). Once the Barrel Retaining Block is unlatched and moved forward the Barrel Retaining Arms rotate out to release the barrel ready to be replaced with the barrel of caliber choice. In the MCS Lower Receiver magazine interchangeability is as easy as dropping the trigger guard and pushing in the Mag Release Button. One caliber's mag well slides off and another is substituted. Then if required the appropriate Bolt Carrier is inserted into the Upper and with an appropriate magazine and the correct caliber ammo to match the barrel the rifle is ready to fire. All WW barrels are clearly stamped with appropriate caliber markings.

Features:

- RMCS-4 System: (1) MCS flat-top upper receiver w/integral railed free-float forend (1) MCS lower receiver w/pistol grip & telescoping stock (4) 16.5" barrels (5.56 NATO/.300 BLK/7.62x39/9MM) (3) bolt carriers (3) magwells (3) mags & (1) heavy-duty custom die-cut foam-lined lockable case
- System provides easy interchangeability of bolt carriers barrels mags
- M4 profile
- Chrome-lined 4150 CMV steel barrels w/black Manganese Phosphate finishes & A2 flash hiders
- Barrels are clearly stamped w/appropriate caliber markings & each includes M1913 railed gas block w/integrated bayonet lug & sling swivel
- CNC machined 7075-T6 aircraft aluminum receivers w/hard coat black anodized finish
- Interchangeable barrel key on underside of upper receiver
- NOTE: 9mm Barrel is NOT chrome-lined & has Melonite finish

Specifications:

- Action: Semi-Automatic
- Caliber: 223 Rem/300 Black Out/762x39mm/9mm
- Capacity: 30 Rounds
- Safety: Lever
- Stock: Black
- Metal Finish: Black
- Purpose: Personal Protection/Sport
- Product Model: Multi-Caliber Rifle