Presma Mil-Spec Polymer Fin / Arm Brace
The Presma Mil-Spec Polymer Fin / Arm Brace is a lightweight, durable solution for AR pistol and compliance-focused builds. Designed around a simple pistol-style brace concept, this unit offers a low-profile footprint while maintaining strength, adjustability, and ease of use.
Machined and assembled in the USA by Presma Inc., this fin/arm brace installs easily onto a mil-spec buffer tube (not included) and features a push-button quick release with a trigger-lock style adjuster for secure positioning.
Constructed from high-strength polymer with reinforced metal inserts, this brace is built to withstand regular use without adding unnecessary weight. Dual strap slots allow for flexible carry or stabilization options depending on your setup.
Key Features
- Lightweight polymer fin / arm brace design
- Fits standard mil-spec AR buffer tubes
- Push-button quick-release adjustment
- Trigger lock-style position adjuster
- Two carry / strap attachment slots
- Simple, low-profile pistol-style design
Specifications
- Manufacturer: Presma Inc.
- SKU: AAST20
- Material: Polymer with metal inserts
- Color: Black
- Country of Origin: Made in the USA
Included in the Box
- Presma Mil-Spec Polymer Fin / Arm Brace
- Retaining screw (M8 x 16mm, black)
Note: Requires a mil-spec buffer tube (not included).
Ideal for builders seeking a minimalist, American-made fin or arm brace solution, the Presma Mil-Spec Polymer Brace delivers durability, simplicity, and dependable fitment.
sound of freedom – This was a great set up. I loved being able to customize the set up. Only issue I had was my own fault as a newb to building these. I used a heavy barrel in a slim hand guard. It makes adding attachments tough with clearances. Hoping someday to also get an AR10 from here.