Patent Pending
Patent Pending
Patent Pending
Patent Pending
Patent Pending
Patent Pending
Patent Pending
Every part is CNC machined from solid billet. No extrusions. No castings.
Lifetime Guarantee
Made in USA
Upper Receiver Kits: Mongoose and 1.36
■ Integrated Fully Retractable Brace (NO Buffer Tube)
■ Long Stroke AK-style Operating System
■ Interchangeable Barrels (different lengths, .300, 5.56)
■ Modular Piston Rod
■ Uses Standard AR15 Lower Receiver, AR15 Barrels, Bolt, cotter pin, and firing pin
■ Lightest, Slimmest and Shortest on the Market; Configurations Under 15” long; 2.418 lbs upper incl. brace; 4.25 lbs completed assembly
■ Elimination of Carrier Tilt with (1) dual carrier paths for piston and BCG, and (2) attaching the piston rigidly to the rear of the BCG
Mongoose: Upper Receiver kit
Chassis Width: only 1.54” from rail to rail
Overall Length: 17.48" w/ 7.5" Barrel + Standard A2 Flash Hider; 21.13"w/ 10.5" Barrel
Non-Reciprocating Left Side Charging Handle
$3020
(requires lower receiver to complete)
Free shipping. No credit card fees.
1.36: Upper Receiver Kit
1.36: Upper Receiver Kit
Chassis Width: only 1.36" rail to rail
Overall Length: 14.9” w/ 5.5” Barrel + Proprietary Flash Hider in Contract Quantities
16.7” w/ 7.5” Barrel + Standard A2 Flash Hider
Reciprocating Right Side Charging Handle
Weight: 2.418 lbs upper incl. brace; 4.25 lbs completed assembly w/ standard lower
$2500
(requires lower receiver to complete)
Free shipping. No credit card fees.
See also versions for jurisdictions that don't allow Flash Hiders or Retractable Braces
Builder's Kits
Ideal for those who may have a specific build in mind, with barrel and accessories of choice.
Detailed assembly instructions provided.
Mongoose: Builder's Kit
Free shipping. No credit card fees
$2670
1.36: Builder's Kit
1.44 lbs
1.36: Builder's Kit
Free shipping. No credit card fees.
$2150
Mongoose: Gallery
1.36: Gallery
Mongoose: Upper Receiver Kit
Integrated Fully Retractable Brace
Interchangeable Barrel Lengths
Modular Piston Rod
Uses Standard AR15 Lower Receiver (and parts kit)
Uses AR15 Barrel
Uses Standard AR15 Bolt, including Cotter Pin
Uses Standard AR15 Firing Pin
Long Stroke AK-style Operating System
Overall Length 17.48" with a 7.5" Barrel and Standard A2 Flash Hider
1.54" Overall Body Width (excluding deflector and charging handle)
Non-Reciprocating Left Side Charging Handle
$3020
(requires lower receiver to complete)
Mongoose: Upper Receiver Kit
■ Chassis Width: only 1.54" from rail to rail
Overall Length: 17.48" w/ 7.5" Barrel + Standard A2 Flash Hider;
21.13" 2/ 10.5" Barrel
■ Non-Reciprocating Left Side Charging Handle
■ Chassis Width: only 1.54" from rail to rail
■ Overall Length: 17.48" w/ 7.5" Barrel + Standard A2 Flash Hider;
21.13" w/ 10.5" Barrel
■ Non-Reciprocating Left Side Charging Handle
Mongoose: Upper Receiver Kit
Mongoose: Upper Receiver Kit
■ Chassis Width: only 1.54" from rail to rail
■ Overall Length: 17.48" w/ 7.5" Barrel + Standard A2 Flash Hider;
21.13" w/ 10.5" Barrel
■ Non-Reciprocating Left Side Charging Handle
Free shipping. No credit card fees.
See also versions for jurisdictions that don't allow Flash Hiders or retractable braces
1.36: Upper Receiver Kit
1.36: Upper Receiver Kit
■ Chassis Width: only 1.36" rail to rail
■ Overall Length: 14.9" w/ 5.5" Barrel + Proprietary Flash Hider in Contract Quantities;
16.7" w/ 7.5" Barrel + Standard A2 Flash Hider
■ Reciprocating Right Side Charging Handle
■ Weight: 2.418 lbs upper incl. brace; 4.25 lbs completed assembly w/ standard lower
$2500
(requires lower receiver to complete)
■ Chassis Width: only 1.36" from rail to rail
■ Overall Length: 14.9" w/ 5.5" Barrel
+ Proprietary Flash Hider in Contract Quantities;
■ 16.7" w/ 7.5" Barrel + Standard A2 Flash Hider
■ Reciprocating Right Side Charging Handle
■ Weight: 2.418 lbs upper incl. brace; 4.25 lbs completed assembly
w/ standard lower
$2500
(requires lower receiver to complete)
XFree shipping. No credit card fees.
1.36: Upper Receiver Kit Integrated Fully Retractable Brace
Interchangeable Barrel Lengths
1.36" Overall Body Width (excluding deflector and charging handle)
Available Overall Length 14.9" with a 5.5" Barrel and Proprietary Flash Hider in Contract Quantities
Overall Length 16.7" with a 7.5" Barrel and Standard A2 Flash Hider
Modular Piston Rod
Uses Standard AR15 Lower Receiver (and parts kit)
Uses AR15 Barrel
Uses Standard AR15 Bolt, including Cotter Pin
Uses Standard AR15 Firing Pin
Long Stroke AK-style Operating System
Free shipping. No credit card fees.
See also versions for jurisdictions that don't allow Flash Hiders or retractable braces
Free shipping. No credit card fees.
See also versions for jurisdictions that don't allow Flash Hiders or retractable braces
Builder's Kits
Ideal for those who may have a specific build in mind, with barrel and accessories of choice.
Detailed assembly instructions provided.
Mongoose: Builder's Kit
Free shipping. No credit card fees
$2670
1.36: Builder's Kit
1.44 lbs
1.36: Builder's Kit
Free shipping. No credit card fees.
$2150
Mongoose: Gallery
Mongoose: Gallery
1.36: Gallery
1.36: Gallery
1.36: Gallery
Solutions to the Existing Limitations
of the AR15/M16 Platform
Solutions to the Existing Limitations of the AR15/M16 Platform
The AR15/M16 platform is one of the most iconic and prolific platforms to ever be invented for civilian, military, and police use around the world. While it is a very popular design, and extremely modular, most iterations retain certain prominent limitations. Namely,
The AR15 gas impingement system results in excessive fouling in the bolt area as well as significant gas blowback in the shooter’s face, causing potential reliability issues due to the fouling.
The AR15 design incorporates a rear-mounted recoil spring as well as a buffer tube limiting the full retraction of the stock.
The rear placement of the charging handle in the AR15 requires the shooter to lift or otherwise move their head when charging the gun.
Any short stroke piston-driven AR15 will suffer from carrier tilt. Carrier tilt occurs when the piston strikes the bolt carrier off-center, causing it to tilt or otherwise move off-axis. Carrier tilt can lead to increased wear, resulting in a loss of accuracy or premature failing of the parts. We have eliminated this problem by (a) providing dual carrier paths for both the piston and the bolt carrier group, and (b) attaching the piston in a rigid fashion to the rear of the bolt carrier group, which pushes the carrier back in a uniform fashion and restricts any off-axis movement.
New Operating System & Interchangeable Barrels
New Operating System & Interchangeable Barrels
New Operating System & Interchangeable Barrels
The 1.36 and Mongoose operating systems use the much more reliable long stroke AK47-style piston system instead of gas impingement.
In this iteration, it is provided in a modular piston rod fashion. The modular piston rod facilitates the easy interchangeability of different barrel lengths requiring the swapping out of a minimum amount of parts.
Fully Retractable Stock or Brace
The placement of the recoil spring in the forward position above the barrel, wrapped around the modular piston rod, allows for a fully retractable stock or brace and for very efficient space utilization
Thinness & Effective Space Utilization
In both Upper Receiver Kits, the design of the bolt carrier is specifically configured to permit the lateral placement of the rails of the retractable stock or brace in such a way as to require a minimal overall width. Even the design of the upper receiver incorporates channels to facilitate the free travel of the rails within its width.
The Mongoose chassis width is only 1.54” from outside rail to rail.
The 1.36 is even thinner. Named after its minimal width, it is only 1.36" rail to rail.
Mongoose Top View of the Retractable Brace Mechanism Retracted and Gas Operating System Showing the Integration of the Brace Rails within the Confines of the Design of the Bolt Carrier, and Therefore the Upper Receiver (not shown)
1.36 Top View of the Retractable Brace and the Operating System.
Elimination of Carrier Tilt
Charging Handle Details: Mongoose Non-Reciprocating & 1.36 Reciprocating
Charging Handle Details: Mongoose Non-Reciprocating & 1.36 Reciprocating
The Mongoose incorporates a non-reciprocating charging handle placed in such a fashion as to not require the shooter to disrupt their sight picture during charging of the gun.
The 1.36 incorporates a reciprocating charging handle to achieve the same result (the shooter need not disrupt their sight picture during charging of the gun due to the placement of the charging handle).
1.36 Chassis Width Reduction
The reason the 1.36 does not incorporate a non-reciprocating charging handle is to allow a reduction in the overall height of the upper receiver.
Multiple other changes have been incorporated to reduce the overall chassis width and the length of the upper receiver. Changes incorporated include:
Switching from a spring-detent loaded takedown pin to a removable locking clip
Angled View showing Extended Rail, ISO BRACE, Integrated Bracket, Locking Clip, Retaining Grommet, Front Rail, and Operating System
Angled View showing the placement of the Locking Clip in relation to the Upper Receiver Kit
2. Several width and height decreasing solutions, such as making the front rail the same width as the barrel nut, allowing exposure of the barrel nut. Designing the top interior circular portion of the front rail to have the same diameter as would be provided by a gas tube to provide a guiding channel for the gas piston and to act as a top section of the gas tube. Designing the bottom piston guide to have the same diameter of a gas tube and thus to act as a lower guide for the gas piston and thus act as the lower section of the gas tube. This proprietary part is held in place by a shelf in the gas block in front and in the rear by slots in the front rail. The combination of the interior top portion of the front rail and the bottom proprietary part act as the top and bottom of the gas tube, which would otherwise be needed, requiring an increase in overall height of the receiver.
Cross Section View of the Operating System showing the incorporation of the Brace Rails, the Locking Clip Mechanism, and Charging Handle.
Cross Section View of the Operating System showing the incorporation of the Brace Rails, the Locking Clip Mechanism, and Charging Handle.
Cross Section View of the Operating System showing the incorporation of the Brace Rails, the Locking Clip Mechanism, and Charging Handle.
3. The redesign of the brace rails and incorporation of a pin detent brace rail locking mechanism that is almost ¾” shorter than that used by the button and slot mechanism in the Mongoose. The button of the Pin Detent Rail Locking Mechanism is incorporated entirely within the depth of the ISO BRACE.
Cross Section View showing the rolling pin brace locking mechanism, the incorporated side rails, integrated bracket, and Charging Handle
Angled View showing the Locking Clip and Retaining Grommet
Cross Section View showing the rolling pin brace locking mechanism, the incorporated side rails, integrated bracket, and Charging Handle
Angled View showing the Locking Clip and Retaining Grommet
The Manufacturing Process
The parts are machined to extremely precise tolerances. In order to achieve the type of machining required, i.e. thin walls, small internal radiuses, and very deep machining depths with small tools, the parts had to be made on the most rigid, expensive CNC machines available. You cannot run these parts on, for example, a HAAS UMC (even though it offers high speed 5 axis machining). What’s required is the rigidity of a machine like the DMG Mori.
The parts also require the most skilled and talented machinists and extensive machining time.
The gun was designed as a no-compromise article--specifically designed to appeal to precise desires and tastes.
While we do not feel there are any comparable articles on the market, those that may be considered comparable are made from heavy, thick-walled extrusion. Akin to comparing a 2x4 with a violin.
ISO BRACE
Purpose
The ISO BRACE (patent pending) is designed to assist able-bodied shooters to operate a pistol more effectively with one hand, not compensated for by physical weakness, but by creating isometric tension. As the shooter forcefully cants the pistol grip forwards and upwards, they create isometric tension against their wrist or forearm. This isometric tension facilitates the rigid control of the firearm.
This brace design is also very useful for military or police use so that the soldier or officer can fully control the weapon with one hand while directing or restraining individuals with their other hand. In addition, control of the weapon with one hand facilitates the use of a shield held in the other hand, providing ballistic protection and offensive capability at the same time.
Versions Available
Brace Versions available:
for the Mongoose and 1.36:
1) Classic;
2) Low Profile; and
3) A Braceless Version fitted with a Pistol End Cap rather than a rail system and brace.
4) The ISO BRACE also has versions designed to fit on an AR15/M16 buffer tube (rather than the Mongoose or 1.36 rail systems).
The following pictures depict two iterations. One is a shortened version with minimum contact with the AR15/M16 buffer tube (ISO BRACE S). The other is a longer version, providing a greater surface area of contact with the buffer tube (ISO BRACE L).
ISO BRACE L: $250
ISO BRACE S: $200
ISO BRACE L Now Available for Preorder; Coming Sept. 2025
ISO BRACE S Coming Soon
ISO BRACE L Now Available for Preorder; Coming Sept. 2025
ISO BRACE S Coming Soon
ISO BRACE: Classic
For Mongoose and 1.36
Designed to optimize for rigid control of the firearm by creating isometric tension against the wrist or forearm
Low Profile Braces
For Mongoose and 1.36
Low-Profile Braces are designed to optimize the accessibility of the pistol grip while the brace is fully collapsed. The brace is shortened to allow for a quick, completely unobstructed grip where the brace is not yet extended, such as in a high-stress scenario. The rail system maintains the same range of motion and the brace is still fully retractable, while still allowing for rigid control of the firearm by creating isometric tension against the wrist or forearm.
Braceless w/o Flash Hider
For Mongoose and 1.36
For jurisdictions that don't allow Retractable Braces or Flash Hiders
ISO BRACE Versions designed to fit on an AR15/M16 buffer tube
The following pictures depict two iterations. One is a shortened version with minimum contact with the AR15/M16 buffer tube (ISO BRACE S). The other is a longer version, providing a greater surface area of contact with the buffer tube (ISO BRACE L).
ISO BRACE L
ISO BRACE S
ISO BRACE S: $200
ISO BRACE L Now Available for Preorder; Coming Sept. 2025
ISO BRACE S Coming Soon
ISO BRACE L Now Available for Preorder; Coming Sept. 2025
ISO BRACE S Coming Soon
The Current Product Line
Lifetime Guarantee
Made in USA
Low-Profile Braces are designed to optimize the accessibility of the pistol grip while the brace is fully collapsed. The brace is shortened to allow for a quick, completely unobstructed grip where the brace is not yet extended, such as in a high-stress scenario. The rail system maintains the same range of motion and the brace is still fully retractable.
Low-Profile Braces are designed to optimize the accessibility of the pistol grip while the brace is fully collapsed. The brace is shortened to allow for a quick, completely unobstructed grip where the brace is not yet extended, such as in a high-stress scenario. The rail system maintains the same range of motion and the brace is still fully retractable.
Custom Orders & Requests
Phone: +1 561-262-1948
411 Walnut St, 19810
Green Cove Springs
FL, 32043
Join the Mailing List
Evolution of Prototypes
Collection of Former Prototypes. Some in anodized form, some non-anodized (bare metal), and some 3D printed.
Includes Patent Pending Upcoming Projects
Preorders
■ Integrated Fully Retractable Brace (NO Buffer Tube)
■ Long Stroke AK-style Operating System
■ Interchangeable Barrels (different lengths, .300, 5.56)
■ Modular Piston Rod
■ Uses Standard AR15 Lower Receiver, AR15 Barrels, Bolt, cotter pin, and firing pin
■ Lightest, Slimmest and Shortest on the Market; Configurations Under 15” long
■ Elimination of Carrier Tilt via (a) dual carrier paths for piston and BCG, and (b) attaching the piston rigidly to the rear of the BCG, pushing the carrier back in a uniform fashion and restricting any off-axis movement.
