AR-9 Micro Breach Pistol Brace Kit – ATF Approved, Complete Buffer System, Anodized Black

Micro Breach Brace Kit: Specs

The Moriarti Arms AR-9 Micro Breach Pistol Brace Kit delivers a lightweight, low-profile solution for your AR-style pistol platform. ATF-approved and engineered for performance, this complete buffer system includes everything you need: brace, buffer tube, castle nut, 9mm buffer, chrome silicon spring, and sling plate—all in one convenient package.

Built to fit all AR-15 pistol buffer tubes up to 1.25" in diameter, this Zytel polymer composite brace locks securely against the buffer tube at two points and requires no special tools for installation. Whether you’re building an AR-9, AR-15, or similar pistol, the snag-free design ensures smooth handling with no gear interference.

Key Features:

• Complete pistol buffer kit included

• Brace length: 8" | Brace weight: 5 oz

• Fits AR pistol tubes up to 1.25" diameter (AR-15, Glock builds, CZ Scorpion Evo 3, HK9X, etc.)

• ATF-approved pistol brace

• Zytel polymer composite construction

• T6 aluminum buffer tube

• Includes: brace, buffer tube, castle nut, one-point sling end plate, 9mm buffer, chrome silicon spring

• Two-point locking compression system for secure fit

• Snag-free, low-profile design

• Tool-free installation

• Lifetime warranty

• Made in the USA

Pair it with our AR-9MM 4″ Slick Side Cone Complete Upper, Non-LRBHO for a complete pistol setup.

FAQ

Can I put a stock on an AR pistol?

Adding a shoulder stock to an AR pistol with a barrel under 16" makes it a short-barreled rifle under the NFA. Do it only in compliance with federal and state rules.

Why use a heavy buffer in a PCC?

Blowback pistol-caliber ARs have no gas system to slow the bolt, so a heavier buffer reduces bolt bounce, wear and felt recoil.

Related: PCC stocks & buffers · pistol caliber carbines

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