Someone told me to make an MBR assault rifle with a bayonet for the Marines, but I decided to make some other changes as well, including an ACR handguard like on the DMR, an AK gas system for ultimate reliability wherever a jarhead might go, and a revised barrel/front sight/flash hider.
Caliber: can be converted to pretty much anything, but this one's in 6.8 Remmington SPC
Capacity: 30 rounds
Action: Can be converted to almost any gas system, this example uses a short stroke gas pistons
Fire modes: Semi, Auto, Safe
Notes: Full Comparability with many AR-type accessories, including: Pistol Grips, Rails, Trigger Guards, Magazines, Sights, Barrels, Flash hiders, Silencers, Buttpads, Selector Switches and Gas Systems
Aftermarket hardware: Magpul MOE grip, PMAG, MBUS sights, Milspec buttpad, ACR grip and trigger guard. EOTech Holo Sight, Custom Long Stroke RIS, S&W M9 bayonet.