AR-15 Builder Kit with 7" M-LOK Handguard & Micro Breach Brace – Multiple Finish Options

Builder's Sets

AR-15 Builder Kit w/ 7" M-LOK Handguard, Micro Breach Brace & Complete Lower Parts Kit – Available in Rainbow PVD, TiN, Chrome – Moriarti Arms

Available Finishes

• Rainbow PVD Finish – Vibrant color-shifting premium coating for a custom high-end look
• Titanium Nitride (TiN) Coated Finish – Gold-toned, corrosion-resistant, ultra-durable surface treatment
• Chrome Finish – High-polish mirror-style finish for a classic clean aesthetic

Build a fully customized AR-15 pistol platform with this complete builder kit from Moriarti Arms. Designed for builders who want performance, modularity, and standout aesthetics, this kit is available in three premium finish options: Rainbow PVD, Titanium Nitride (TiN), and Chrome.

Each configuration includes a lightweight 7" M-LOK free-float handguard, complete buffer tube assembly, enhanced lower parts kit, and the Micro Breach pistol stabilizing brace. Whether you're building a range-ready pistol or a display-grade custom setup, this kit delivers both functionality and visual impact.

The 7" M-LOK handguard features a proprietary barrel nut system and a tight monolithic-style fit against the receiver for improved rigidity. The included control upgrades—such as ambidextrous safety, extended mag release, bolt catch enhancements, and anti-rotation pins—improve handling and usability across all shooting conditions.

The Micro Breach brace adds compact stability with a snag-free profile and dual locking points for improved control in an AR pistol configuration.

Features

Complete Buffer Tube Assembly

• T6 aluminum construction
• Castle nut, end plate, buffer spring included
• 3 oz stainless steel carbine buffer
• One-point ambi sling end plate
• Made in USA

Pistol Grip

• T6 aluminum construction
• Skeletonized lightweight design
• Ergonomic finger grooves
• Total weight: 3.6 oz
• Enhanced trigger control feel

7" M-LOK Handguard

• Ultra-lightweight free-float design
• T6 aluminum body
• Proprietary barrel nut included
• Internal diameter: 1.34"
• M-LOK compatible
• Tight receiver fit for monolithic-style top rail
• Total weight (with barrel nut): 6.5 oz

Enhanced Lower Parts Kit

• Ambidextrous short-throw safety selector
• Forward assist assembly
• Extended takedown pin set
• Anti-rotation pin set
• Extended mag release & bolt catch
• Enhanced trigger guard
• Micro angle grip
• Heavy-duty castle nut

Micro Breach Pistol Brace

• Zytel polymer composite construction
• Lightweight: 5.3 oz
• Length: 6.25"
• Fits buffer tubes up to 1.25" diameter
• Dual locking points for stability
• Snag-free compact design
• Lifetime warranty
• Easy installation (no special tools required)