Tag Archives: m4 6.8 mm upper

6.8x43mm SPC Cartridge for Urban Warfare CQB and Short-to-Medium-Range Sniping

by David Crane david@defensereview.com Anybody who’s been keeping abreast of small arms and ammo develpments in the USSOCOM arena should already be aware fo the 6.8x43mm SPC a.k.a. "6.8mm Remington SPC (Special Purpose Cartridge)" cartridge concept. The 6.8x43mm Special Purpose Cartridge (SPC) was conceived and designed with the help of members of the U.S. Army 5th Special Forces Group as …

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