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Carefully selected by our chief engineer (Phd.) and tested by ECHO1's chief technician.

CNC Lightweight Alumninum with Level II Black Anodize (seamlessly integrates with Madbull black outer barrels). CCW threaded on both ends. Hides extra inner barrel slack. Adds space for quick detach or other barrel accessories. Solves common issues: a) inner barrel longer than outer barrel. b) RIS longer than outer barrel.
Recommended for use with Madbull outer barrels

CNC Lightweight Alumninum with Level II Black Anodize (seamlessly integrates with Madbull black outer barrels). CCW threaded on both ends. Hides extra inner barrel slack. Adds space for quick detach or other barrel accessories. Solves common issues: a) inner barrel longer than outer barrel. b) RIS longer than outer barrel. Recommended for use with Madbull outer barrels

The Madbull XCR-FAST, which stands for “Fully Adjustable STock” can be quickly deployed from the folded position by the push of a strategically placed button and flick of the fingers. It locks firmly into the deployed and folded positions. It can be adjusted so that any user using any sight can be perfectly comfortable. Our stock is light at approximately one pound. It is very thin at less than one inch in width. Folded it creates a tight, compact package. We designed this to work with all your gear, be it face masks or goggles. No tilting the head necessary for seeing your sights. Fastest sight acquisition time possible. The fully adjustable stock can be configured so that any user can be comfortable with any sight or optic. Madbull is known for making the highest quality licensed products and the XCR-FAST is no exception!

The Strike Industries SIEGEN Rail Cover adds an innovative way to upgrade your favorite rail/handguard with proper weapon light/laser cable management while providing a positive tactile feeling for M-LOK compatible slots. Rail covers are a quick and affordable upgrade to mitigate any heat transfer between the barrel and the shooters hands. Made of NBR 1052 rubber, it withstands heat up to 320° F. While comfort and protection from heat and sharp edges are already important features, incorporating a cavity that runs parallel to the barrel which was intently designed to manage and protect various accessory wires was one of the main focuses of the SI SIEGEN Rail Cover. Take the existing rail covers SI already offers and introduce additional functionality. No wires to cover yet? Don't worry, the SIEGEN rail cover includes cavity inserts which act as a robust placeholder for when you are ready for cables to manage. Need to modify your setup for a certain situation? Easily move these rail cover as you are not limited to a set position or configuration. Push them into the M-LOK slots and you are ready to go in seconds. It's that easy. Get organized with the Strike Industries SIEGEN Rail Cover and ditch the cable ties or electrical tape.

COMPATIBILITY: M-LOK

NOTE: SIEGEN Cover will stay in M-LOK slot without wire cavity insert, but will most likely fall out during shooting/weapon manipulation.