LMT L129A1 / LMT .308
It was announced earlier this year that Lewis Machine & Tool's 7.62mm AR-10 style rifle was selected by the British Army as their new marksmen weapon. They had the L129A1 on display at SHOT.
It was announced earlier this year that Lewis Machine & Tool's 7.62mm AR-10 style rifle was selected by the British Army as their new marksmen weapon. They had the L129A1 on display at SHOT.
LMT (Lewis Machine & Tool) have developed an AR-10 version of their AR-15 CQB MRP rifle called the MTP MRP 308.

Click to expand. Photo Copyright Ken Lunde. Used with permission.
It uses the LMT Monolithic Rail Platform which is a one piece upper receiver and free floating handguard that is machined from sold aluminum.

The AR-15 MRP upper. Click to expand.
The name suggests it can handle the higher pressure .308 Winchester round as well as 7.62×51mm NATO (no, they are not the same).
I don’t have anymore info on the rifle and do not know if it uses the LMT gas piston system.
I came across an M4 comparison chart. Its compares the Colt 6920, LMT, Noveske M4 Light Carbine, Sabre Defense XR15-A3 M4, S&W M&P15 CMMG 16″ M4 Carbine, Stag Model 1, Bushmaster BCWA3F 16M, Rock Rivers Arms AR1251X, Armalite M-15A4C, Olympic K3B-M4-A3 and DPMS AP4-C.
Click to enlarge.
The latest version of this chart can be found here on m4carbine.net