308 Win.Īlthough the bolt carrier group is of similar size to the AR-15s, the two are not interchangeable. Taking advantage of these materials, the SFAR’s bolt and barrel extension are machined from a high nickel content, high-strength steel that can handle the increased load of the. There are steels today that simply weren’t available when the AR was designed. How did the engineers make this work? They started by increasing the strength characteristics of the bolt and the barrel extension that it interfaces with. The magic to the SFAR, though, it is under the hood. When in doubt or when reliability trumps all else, run the system wide-open. The simple method of determining this setting is to dial down the regulator until reliability suffers, then open the system back up one step.

Ruger recommends running the gas regulator at the lowest setting at which the rifle will function reliably with the chosen ammunition. The final position is a shutoff, effectively making the rifle a straight-pull bolt action. The third position is even more restrictive and is designed for use when a suppressor is attached to the barrel since these devices can create significant back pressure from trapped propellant gases. The muzzle is threaded 5/8x24, so it will take suppressors and other devices.Īt the second position, less gas is allowed through, which cuts recoil and what I call “bolt carrier bounce”-the effect of the carrier slamming the buffer rearward with more force than is necessary to cycle the action. Ruger’s Boomer muzzle brake was effective in mitigating recoil. cartridge, the life of a barrel should be extremely long. Barrels are black nitrided for corrosion and wear resistance, so combined with the durable results of the hammer-forging process and the nature of the. Rifling is 5R, and twist rate is the standard 1:10. I tested the more compact Model 5610.īoth rifles wear cold-hammer-forged 4140 chrome-moly barrels made in-house by Ruger. They weigh in at 6.8 and 7.3 pounds respectively. The SFAR is currently available in two formats: the Model 5611, a full-size rifle with a 20-inch barrel, and the Model 5610, a 16.10-inch barreled carbine.

308 in a light and handy package.įrom the outside, the SFAR basically looks like an AR-15 with an AR-10-size magazine well. The result combines the power, versatility and ammunition availability of the. They figured out a way to effectively wedge an AR-10-size cartridge-.308 Win.-into an AR-15-size rifle. With the SFAR, Ruger engineers went in a completely different direction. The result was the development of niche cartridges such as the 6.5 Grendel and 6mm ARC. Over the years, many users have sought the punch of the AR-10 but without the weight and bulk, leading ballisticians to effectively max-out the power available on the smaller format rifle. Though the features were similar, AR-10s are significantly larger and heavier-two pounds, on average-than AR-15s, making them less desirable for widespread use. The SFAR has a Picatinny rail up top for scope mounting, and a Magpul PMag 20-round magazine is supplied. This rifle, widely known as the AR-10, was later scaled-down by Stoner and Jim Sullivan into what would become the 5.56x45 AR-15. When Armalite’s Eugene Stoner invented the rifle that we know now as the AR, he did so in 7.62x51. Let’s take a step back to the 1950s where this story begins. 308 Winchester but in what is essentially a. Ruger’s new Small Frame Autoloading Rifle (SFAR) does what no other rifle that I’m aware of has ever done: It is chambered in.

This year, I finally get the chance to talk about an AR-style rifle that is new and unique. Innovations were subtle and incremental-at best. Most of them were great guns, but I found myself struggling to say something new and unique about rifles that were anything but.

Time your muzzle device quickly and easily.When I began my outdoor writing career back around 2006, it seemed like every rifle I tested was some flavor of AR.

By not having to overcome the resistance of the crush washer, this allows devices to be removed and reinstalled in the field if desired. It is recommended that you tighten the device to the recommended torque specification of 20-25 foot pounds.

By using the extension nut to adjust the length of the device, you can adjust the rotational timing. On barrels of all lengths, the Gunner significantly reduces felt recoil.įaxon's invented 'Muzzlok' feature on this device allows for easy timing and installation of your device without the need for a crush washer or shims. The 3 ports work to sequentially capture the propellant gasses and redirect them to the sides for maximum recoil reduction. Our Gunner 3 Port Muzzle Brake is the ideal blend of usability, versatility, and recoil reduction. Gunner 458 Socom 3 Port Muzzle Brake w/ MuzzLok®

450 bushmaster muzzle brake