What seems to me like overnight, SIG SAUER has gone from being primarily a pistol producer to a source of company-branded ammunition, optics, rifles and even airguns including a highly rated custom shop and training academy. The firm's current AR offerings are extensive and different.
There are direct impingement systems and piston driven systems. Rifles chambered for the .22 RF, 5.56 and 7.62. A compact 9mm submachinegun with AR-type controls and even an AR designed specifically for suppressor work and chambered for the .300 Blackout. But the M400 Predator caught my eye. With its striking Geissele-inspired, ALG Defense handguard, it's competition ready and equally adapted to hard field use right out of the box.
The Predator sports some neat features. The 416 stainless steel barrel is 18 inches long with a l:8-inch rate-of-twist and a muzzle threaded 1/2x28 TPI. The safety and magazine release are ambidextrous, although I'm still not sold on ambidextrous safety levers that rotate against your trigger finger when the safety is taken off. It would be better if the safety were reversible--not ambidextrous.
There are quick-detachable, ambi-sling mounts integral with the lower. The trigger is 2-stage and described as a "match trigger." It is. It averaged 4 pounds, 11 ounces, on my Lyman electronic gauge but, most importantly, the second-stage release was crisp with an undetectable degree of over-travel and a lightening reset. In a production rifle, SIG's trigger is a joy, plus it rides in a triggerguard generously oversized to accommodate combat gloves and winter mittens.
The stocking consists of a 6-position Magpul buttstock capped off with a very functional rubber buttplate and an over-molded, SIG pistol grip--pretty common hardware those, but not the snaky ALG Defense handguard.
Giving the Predator its long, sleek, distinctive lines and excellent handling qualities is the "Ergonomic Modular Rail V2 M-Lok handguard by ALG Defense, a sister organization to Geissele Automatics. Known to all AR enthusiasts, the state-of-the-art Geissele AR triggers have earned themselves a distinguished reputation. Their designer is Bill Geissele of Geissele Automatics, which produces not only triggers but a complete line of precision AR parts and armorer's tools. Geissele is an engineer's engineer. He's a brilliant designer who has the ability to communicate the features of his designs in plain English and with such clarity the least mechanically gifted shooter...