Proprietary Defense R&D
& Professional Weapon Systems

Proprietary Defense R&D
& Professional Weapon Systems

X-Gun designed specificaly for drone
X-Gun designed specificaly for drone
X-Gun designed specificaly for drone
X-Gun

X-Gun

A Minimalistic and Lightweight Firearm System Purpose-Built for UAS, with Hybrid Piston Operating System

A Minimalistic and Lightweight Firearm System Purpose-Built for UAS, with Hybrid Piston Operating System

Patent Pending. Disclosed Model shown w/ 7.5" barrel.

Patent Pending. Disclosed Model shown w/ 7.5" barrel.

BrashZero Caseless Firearm Operating System
BrashZero Caseless Firearm Operating System
BrashZero Caseless Firearm Operating System
BrashZero

BrashZero

A Caseless Firearm Operating System Utilizing Standard
NATO-Spec Ammunition Components, with Multi-Caliber Adaptability

A Caseless Firearm Operating System Utilizing Standard
NATO-Spec Ammunition Components, with Multi-Caliber Adaptability

Patent Pending. Disclosed Model shown w/ 7.5" barrel.

Patent Pending. Disclosed Model shown w/ 7.5" barrel.

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Blecher LLC Is Offering a Limited Range of Highly Developed Models in Small Batch Quantities:

Contract Quantities Also Available.

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About

We are an advanced research, design, and troubleshooting house for the defense contracting industry. We solve problems that others cannot. From a philosophical perspective, rather than an economic one, we have decided to make available limited edition, short run, small batch, conceptual designs. 



Our projects are each designed as a no-compromise article--specifically designed to appeal to precise desires and tastes.



We are not a traditional firearms manufacturer. We leverage a vertically integrated, decentralized manufacturing pipeline. We first formulate every aspect of the production process, from designing proprietary fixtures, to speeds, feeds, and specialized tool paths and tooling. We then leverage a hand-selected network of high-quality manufacturing contacts to rapidly transform initial concepts into functional prototypes and seamlessly scale to high-volume mass production.

Upper Receiver Kits: Mongoose and 1.36
Upper Receiver Kits:
Mongoose and 1.36
Upper Receiver Kits: Mongoose and 1.36
Blecher LLC Mongoose Upper AR15
Blecher LLC Mongoose Upper AR15
Blecher LLC Mongoose Upper AR15
Blecher LLC 1.36 AR Upper
Blecher LLC 1.36 AR Upper
Blecher LLC 1.36 AR Upper
■ 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 
■ 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 


Auto Bolts Available by Contract

Every part is CNC machined from solid billet. No extrusions. No castings. No MIM.
Lifetime Guarantee

Made in USA

Mongoose: Upper kit

Batch Size: 350 Units Total

■ 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 kit

Batch Size: 350 Units Total

■ 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

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1.36: Upper kit

Batch Size: 350 Units Total

■ 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

■ 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; 
1.44 lbs proprietary parts assembly w/o barrel or bolt

■ 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; 
1.44 lbs proprietary parts assembly w/o barrel or bolt

Copyright © 2025 Blecher LLC. All rights reserved.

Copyright © 2025 Blecher LLC. All rights reserved.

Copyright © 2025 Blecher LLC. All rights reserved.

1.36 Upper Kit

Batch Size: 350 Units Total

■ 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; 
1.44 lbs proprietary parts assembly w/o barrel or bolt