Kaiser US X7 Fusion Amphibian AR Pistol

Amphibian Controls(C)
Controls are all standard AR fare. An ambi sling attachment point on the buffer tube and Magpul MBUS sights are standard. For testing we mounted an Aimpoint Micro T2 (Aimpoint.com) in an ADM (americandefensemfg.com) QD mount.

Furniture consists of a Magpul AFG angled foregrip mounted far forward on the 9 o’clock KeyMod flat and an XTECH  ATG pistol grip that is adjustable for three different angles 17, 25 and 33 degrees) to ensure the proper fit for any hand. Surrounding the tail end of the NP3 Plus coated Mil-Spec buffer tube is a closed cell foam tube that provides a cushioned cheek rest for a 3-point hold. An ambidextrous, NP3 Plus coated sling attachment plate is mounted at the forward end of the buffer tube. Overall length is 26.5 inches and empty weight measured 5 lbs. 1 oz. without magazine, but with sights and furniture attached.

Amphibian Case 1(C)Except for being NP3 Plus coated, all of the controls are Mil-Spec fare and are found in their usual locations. The bolt is machined from Carpenter 158 steel, and it, along with the bolt carrier and other internals. are all NP3 Plus coated. The single stage Mil-Spec trigger is pretty typical of that genre. After a moderate degree of take-up and bit of stacking, it broke cleanly at an average pull weight of 5 lbs. 15 oz. The charging handle, which is also NP3 Plus coated, features and extended locking/pull latch mounted to its left-hand ear.

The Amphibian comes with a single-point sling, bright orange Brownell’s Safe Port empty chamber indicator and six Magpul PMAG Gen MA 30-round polymer magazines, all packed in a Nanuk 940 protective case with PowerClaw latching system. Made from NK-7 impact-resistant resin, the Nanuk case is waterproof, Category 1 impact resistant and has a closed-cell foam interior with cutouts for the Amphibian, sling and six 30-round magazines.

Amphibian Stock(C)
A padded buffer tube (also NP3 coated) and Xtech ATG adjustable hand grip bring up the rear.

For testing we mounted Aimpoint’s newest Micro—the T-2 red-dot sight ($761; aim point.com)—on the receiver top rail. The Micro T-2’s unlimited eye relief, 1X magnification and 2-MOA red dot made this the perfect sight for the close-range work the Amphibian was deigned for, but precise enough to reach out if need be. We sighted the Amphibian at 50-yards and went to work on our Salute steel-plate targets for the first 200-rounds to make sure it would run without fail. It did—even with a periodic dunking in the murky pond positioned smack dab in the middle of our shooting grounds. Why the water-boarding? Well, you can’t call a gun the “Amphibian” if it’s afraid to get wet, can you?

Amphibian MainSticking with our 50-yard sight-in distance, we moved to the bench to see if the Amphibian could match its perfect function with on-paper precision. Again, it did. Our best 5-shot group was punched with Black Hills 77-grain OTM 5.56x45mm ammunition, and measured an impressively-small 0.95 inches…outstanding performance for a pistol, without a doubt. All other groups came in below 2-inches, and the Amphibian showed a distinct preference for 62-grain and above ammunition.

See the KSP X7 Fusion Amphibian AR pistol at your firearms dealer, or for more information contact Kaiser US Shooting Products, Dept. OT;
Tel.: (520) 561-8227;
Web: www.kaiserus.com