New From Windham Weaponry: Multi-Caliber System AR Rifle (RMCS)


Windham Weaponry will be unveiling its new RMCS offerings next week at SHOT Show 2016. I’ve added them to my list of booths to visit, but the short story is one AR-pattern lower receiver with swappable magwells, and a quick-change barrel system in the upper receiver. Kits are offered with all of the parts needed to rapidly swap between two (.223 and .300 BLK), three (.223, .300 BLK, and 7.62×39), or four (.223, .300 BLK, 7.62×39, and 9×19) calibers. I assume caliber conversions will be available separately for people who start with a two-caliber kit and want to expand later, but that isn’t mentioned the following press release and product video . . .

See the Revolutionary Multi-Caliber System at the 2016 SHOT Show

Windham, Maine (January 14, 2016) – In one of the most exciting announcements to come from Windham Weaponry since its inception in 2011, the Company invites attendees of the 2016 Shooting, Hunting, and Outdoor Trade Show (SHOT Show) to visit them in booth #10376 to see their new multi-caliber AR Platform rifle series. The Windham Weaponry Multi-Caliber System (MCS) is a groundbreaking new rifle that allows the user to convert between calibers by changing out the barrel, magwell, and bolt carrier group and utilize the same lower and upper receivers. The MCS is available in three configurations, and offers up to four caliber options in one AR platform rifle.

With only a few simple steps, change between .223 Rem.-5.56mm NATO, .300 Blackout, 7.62 x 39mm, and 9mm calibers.

  • RMCS-2: .223 Rem.-.5.56mm NATO / .300 Blackout calibers
  • RMCS-3: .223 Rem.-.5.56mm NATO / .300 Blackout calibers / 7.62 x 39mm
  • RMCS-4: .223 Rem.-.5.56mm NATO / .300 Blackout calibers / 7.62 x 39mm / 9mm
Manufacturer’s suggested retail price on the RMCS AR Platform series ranges from $1,738 to $2,971.