SHOT Show Day 3 Part 2 | Sons Of Liberty MK1 SOCOM Contract Rifle, A 10mm Nemo Mongoose, & More

Perfect Zero and Atlas 2011 grips, Prodigy tuning, and build kits

The segment opens at the Perfect Zero and Atlas booth with a look at new offerings for 2011-style pistols. Atlas has launched the Alpha Grip for Staccato handguns, giving users panel-style grip options on traditional 2011 platforms, though not on the P4 series. They are also tuning Springfield Prodigy pistols, including compensated models, with upgraded grips, new trigger components, revised safeties, and reliability and lockup work to make cycling smoother. Pricing for these tuned Prodigies ranges from about $1,800 for the base level to around $2,500, with the most complete package at roughly $3,000. Atlas is also offering a 1911 double-stack build kit developed with Optimum Manufacturing, pairing a pre-fit frame and slide with Atlas parts. The kit includes every component needed to assemble a double-stack 1911 handgun except the optics plate, magwell, and magazines. An aluminum grip for Staccato HD series pistols, including the HD P4 and P4.5, is also shown.

Nemo Mongoose 10mm PCC design and recoil system

At the Nemo Arms booth, the discussion turns to the Mongoose pistol-caliber carbine line. The designer explains that the Mongoose was created to reduce recoil compared to typical straight blowback PCCs by using a short-recoil tilting-barrel system similar to many handguns. A new 10mm version features a 7-inch barrel and is pushing 180-grain bullets at about 1,350 feet per second, offering substantial energy in a compact format. It uses Glock-style magazines compatible with G20 patterns and includes ambidextrous controls for the safety, bolt catch, and magazine release, along with last-round hold open. The platform is designed to be easy to field strip and to maintain low felt recoil while delivering 10mm performance. Pricing is expected to be comparable to the existing 9mm Mongoose, which retails around $2,699, with the 10mm currently in low-volume pre-production.

Controls, triggers, and configuration options on the Mongoose

Further details on the Mongoose highlight its configuration and control layout. The firearm ships with an SB Tactical folding brace and includes two different end caps, one being a flat plate that allows a suppressor to be mounted at the front. The charging handle is reversible, which benefits left-handed shooters. The design uses an AR-style trigger group, and Nemo worked with TriggerTech to develop a low-mass hammer and spring optimized for 9mm use. That TriggerTech unit is installed in the 10mm sample on display, though the designer notes that standard AR-15 triggers have functioned reliably in the 10mm configuration due to the cartridge’s higher energy. For 9mm versions, the TriggerTech trigger is recommended. Overall, the Mongoose line aims to combine the familiar ergonomics of an AR-style trigger system with a tilting-barrel recoil setup and fully ambidextrous controls in a compact PCC platform.

Nemo Electus lightweight bolt-action hunting rifle

The conversation then shifts to the Nemo Electus, described as Nemo’s first bolt-action rifle released to the broader market. The Electus is based on a lightweight backcountry hunting build used in Idaho, where long hikes and remote terrain demand a compact, reliable rifle. It uses a carbon-fiber Manners stock with a folding mechanism and magnetic retention, allowing the bolt handle to nest neatly for easier backpack carry. The rifle weighs around six to twelve pounds depending on configuration and is offered in PRC cartridges, the 7mm Backcountry, and 6.5 Creedmoor. It features a titanium receiver with a controlled-feed bolt and floating bolt head, a TriggerTech Diamond trigger, and flush-fit magazines with a magazine release integrated into the trigger guard to avoid snagging. Most barrels are 20 inches or shorter, often carbon-fiber wrapped Proof Research barrels on a Remington 700 footprint action, with an integrated Picatinny rail, QD sling points, an arca-style rail, and adjustable cheek height. The setup is intended for suppressed hunting with a short suppressor while remaining accurate and easy to carry.

Ruger American Scout bolt-action with irons and AR calibers

Coverage continues at the Ruger booth with a focus on the Ruger American Scout line. Ruger initially released the Scout as an exclusive and is now bringing a catalog version to market. The rifle is a bolt-action design with iron sights, aimed at hunters and shooters who want an out-of-the-box solution that does not rely solely on optics. It uses a 16-inch barrel to keep the package compact and includes an extended scout rail to support accessories such as clip-on night vision, making it suitable for applications like pig hunting. The first catalog model is chambered in 5.56, with additional chamberings planned. A 7.62x39 version will accept AK-pattern magazines, including PMAG-style AK mags with a rock-and-lock interface, instead of Ruger’s traditional Mini-30 magazines, reflecting user demand. Ruger also plans offerings in 350 Legend, 308, 300 Blackout, and newer AR-centric cartridges, with an MSRP listed at $929.