Welcome to the official technical overview of the stock and stabilizer configurations available for your handgun conversion kit platform. Selecting the correct rear attachment is critical for ergonomic performance, accuracy optimization, and strict adherence to federal firearms laws. This guide covers the legal definitions under the National Firearms Act (NFA), Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) guidelines, and detailed product specifications.
Understanding the regulatory boundary lines established by federal oversight bodies prevents accidental compliance infractions.
Equipping your handgun conversion chassis with a traditional rifle stock alters the core legal classification of the firearm. According to the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF), attaching a rigid shoulder stock to a handgun converts the assembly into a Short Barreled Rifle (SBR).
🛑 CRITICAL REGULATORY WARNING: Operating a chassis with an NFA Stock configuration falls strictly under the National Firearms Act classification. You are legally required to SBR your handgun before installation. This federal registration process requires submitting comprehensive paperwork, undergoing background checks, and paying a mandatory $200.00 tax stamp fee directly to the BATFE. Assembling this setup without an approved tax stamp is a violation of federal law.
Pistol stabilizing braces are physically engineered with the explicit intention of being secured directly to the shooter's forearm using an integrated strap. We are the exclusive licensee of the SB Tactical stabilizer brace for these conversion kits. Per official ATF rulings, using an approved stabilizer brace keeps the host firearm classified legally as a standard pistol. This allows you to bypass the $200.00 tax stamp fee, lengthy federal wait times, and SBR registration paperwork entirely.
Use the high-contrast diagnostic matrix below to compare SKUs, MSRP pricing, legal statuses, and unique mechanical design features across our product generations:
| Configuration Name | SKU | MSRP | Legal Status | Primary Design Intent & Mechanical Features |
|---|---|---|---|---|
| Short Stabilizer | MCKSB | $49.95 | Pistol (Non-NFA) | Designed with the intention of being secured to your arm with the built-in Velcro strap. Allows for maximum mobility in close-quarters environments. Can be completely folded to provide more compact carry profiles. Authorized exclusively under SB Tactical patent licensing. |
| Extended Stabilizer | MCKSBL | $49.95 | Pistol (Non-NFA) | Provides a significantly more stable platform which increases overall shooting stability and downrange accuracy. Intended to be secured to your arm with the Velcro strap. Arrives as the standard factory configuration included with all Gen 1 conversion kits. |
| Gen 1 Stock | MCKSTK | $49.95 | Regulated SBR (NFA) | Structural rifle stock variant engineered explicitly to be placed firmly against the shooter's shoulder. This design allows for maximum framework stability and shot-to-shot accuracy. Requires an approved BATFE Form 1 tax stamp prior to assembly. |
| Gen 2 Stock | MCKGEN2STK | $49.95 | Regulated SBR (NFA) | Custom engineered for our Gen 2 platform lines only. Designed specifically to be placed against the shoulder while actively firing Gen 2 models. Provides optimum user comfort and ergonomics while maximizing stability. Requires an approved BATFE Form 1 tax stamp prior to assembly. |
| Gen 2 Stabilizer | MCKSBLGEN2 | $64.95 | Pistol (Non-NFA) | Constructed out of premium high-impact polymer and specialized TPE rubber that is lighter and more durable than conventional rubber. Engineered to unlock and fire while remaining completely in the folded and locked position. Universally compatible across both Gen 1 and Gen 2 chassis frameworks. Features authorized SB Tactical licensing. |
⚖️ Important Regulatory Disclaimer: The state law and firearm assembly information provided in this article is for general informational and educational tracking purposes only. Firearm conversion chassis, brace definitions, and accessory laws change constantly, rendering online informational articles out of date quickly. CAA assumes no liability for reliance on this text. Always cross-reference your current state, county, and local ordinances before purchasing, processing, or assembling any conversion gear.