MGI is now making the MARCK 15 chambered for the .300 BLK cartridge. Complete guns and caliber conversion kits are both available. The rifle carries an MSRP of $1,299 and the kit is $555.
This gun is part of the MARCK 15 line of modular rifles made by MGI. The guns are designed so that the user can easily swap barrels, bolts and magwells to change the rifle caliber to one of several choices. Other calibers available include 5.56, 7.62×39, .308, .22 LR, .40 S&W and 9mm.
A .45 ACP version in action: