200 rounds later, I was tearing a ragged hole into a 3x5 card at the 50 and 100. After getting on paper with a Primary Arms 1x Cyclops at 50 meters, the accuracy with this 10,5' 5.56 barrel was immediately evident with a 1 inch triangle group using my plinker 55gr handloads.

A wise man once said that 'straight lines are strong.'. The 12' rail keeps my support arm straight, while my primary wrist is straight using that K2. AR pistols are great, but the typical 9' rail don't work for me. It's perfect! I mounted the upper on a closed ear Anderson lower with a SB3 brace, ALG A.C.T. Our two-pin proprietary barrel nut system with its locking anti-slip plate, sets LaRue handguards apart from the competition. The side and bottom rails cover carbine-length gas blocks, and provide true free-float. The complete upper looks sweeet! The muzzle just pokes out of the rail by a 1/2 inch. This is the only rail that allows the proper placement of Aimpoint M2, PEQ-2A and front flip-up sight over a 10.5' barrel. I have a BA NiB BCG and a BMC medium charging handle. I mounted this barrel into an Aero Precision M4E1 upper, surrounded it with an AP 12' enhanced quad rail, and capped it off with a KAK flash can. Full disclosure, I purchased this barrel from another authorized dealer for a great price.

10 inch quad rail 10.5 inch barrell