Smith & Wesson M&P (4″ Barrel) | Micro Conversion Kit
(23 customer reviews)

Smith & Wesson M&P (4″ Barrel) | Micro Conversion Kit

From: $284.00

Your Smith & Wesson M&P (4" Barrel) MCK Selection

The Compact Solution | TAC STAND-ALONE

Optional Advanced Kit

Front & Rear Flip Up Sights & OPS May Vary Based On Inventory

All of the BEST accessories available for your MCK all in one place! Save a few dollars when you bundle our 500 lumen MCK mounted flashlight/housing, backup flip sights, thumbs rests, sling and sling swivel. Everything to get you to the range and accurate right out of the box!

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This Micro Conversion Kit is a lightweight and sturdy platform for Smith & Wesson handguns. It has a barrel shroud made of aluminum with a polymer body. The extended stabilizer, which now comes standard, enables one-handed firing for better shooting performance. It also comes with a Velcro® strap fastener which provides a custom fit to any user. MCK is the most cost effective conversion kit in the world. Fastest assembly/disassembly conversion kit on the market. Improving accuracy dramatically up to 200 yards. We are the exclusive licensee of the SB tactical stabilizer brace for the handgun conversion kits


Top Features:

  • A Standard Aluminum Rail (New as of 5/10/22)
  • Gen 2 Stabilizer, standard (New as of 5/10/22)
  • Mag Catch (New as of 5/10/22)
  • No pistol disassembly required – Just place pistol into the kit, lock, and go
  • Allows for multiple handgun models into one platform
  • Top Picatinny rail, allowing a combination of sights and/or optics
  • Side Picatinny rails for mounting additional accessories, i.e… thumb-rests
  • Ambidextrous, fast and easy handling
  • Right-folding stock/arm brace for easy concealment and carry, locks in the folded position
  • Front spare magazine holder for a faster reload
  • Built-in charging handle allowing for quicker assembly/disassembly
  • Exposed slide release for direct contact and easier use
  • Allows for quicker assembly-disassembly
  • Perfect for safe action
  • Fits multiple handgun models
  • Easy concealment and carry
  • Perfect for law enforcement
  • Not Suppressor Friendly


MCK Measurements:

  • Width: 2.48
  • Height: 5.70
  • Length: 13.70


What is included in the Advanced Upgrade Kit:

  • Polymer-pair side rail thumb rests (MCKTHR)
  • Push button sling swivel (MCKPBSS)
  • One point sling (MCKOPS)
  • Flashlight that fits MCK & Micro Roni 17 / 19 chassis (MCKFL)
  • Polymer front flip-up sight (MCKFBUS),
  • Polymer front rear-up sight (MCKRBUS)

Handgun Model

Smith & Wesson M2.0 4 Inch


Stabilizer, NFA Stock, Short Stabilizer, Gen 2 Stabilizer (Add 20)


Black, White, Red, Orange, Blue, Pink, Green – ODG, Tan – FDE, Grey – Tungsten, Clear (Add 25), True Timber (Add 100), True Timber Viper (Add 100), Real Tree (Add 100), Mossy Oak (Add 100)

Top Picatinny Rail

Polymer, Aluminum (Add 35)

Your Smith & Wesson M&P (4" Barrel) MCK Selection

Weight 5 lbs
Dimensions 17 × 8 × 7 in

Smith & Wesson M2.0 4 Inch

Color / Pattern

Black, Green – ODG, Grey – Tungsten, Tan – FDE, White, Red, Blue, Orange, Pink, Clear (Add 25), Multicam Black (Add 120), True Timber Strata (Add 100), True Timber Viper (Add 100), Mossy Oak (Add 100), Real Tree (Add 100), Gold (Add 50)

Stabilizer / Stock

Gen 2 Stabilizer, NFA Gen 2 Stock, Short Stabilizer, TAC (No Stabilizer)

The Compact Solution | TAC STAND-ALONE

Weight 1 lbs
Dimensions 8.5 × 12 × 2 in

Optional Advanced Kit

Weight 1 lbs
Dimensions 8.5 × 12 × 2 in


WARNING: Observe safe firearm handling practices at all times. Failure to do so may result in serious bodily injury or death. CAA USA shall not be responsible for injury, death, or property damage resulting from faulty installation, misuse, illegal use, or modification of this product.

23 reviews for Smith & Wesson M&P (4″ Barrel) | Micro Conversion Kit

Based on 23 reviews
5 star
4 star
3 star
2 star
1 star
  1. Great companion to my 4″ Smith & Wesson. Definitely increases accuracy and is a blast to shoot.

  2. I love my MCK. Only regret is not getting the flip up sight/ red dot combo, for the $99 Black Friday price. I got some flip ups from another source and they didn’t fit right due to a pretty obvious oversight on my part, now the sale is over. But other than that, my accuracy even with just my laser sight mounted on side rail, has gotten rediculously tight. Fun and comfortable to shoot..

  3. Great addition to my pistol like getting a new gun with out breaking the bank

Only logged in customers who have purchased this product may leave a review.


*Flashlight, Flip-up Sights, and Thumb Rests not included

*Only compatible with the M&P with the 4″ barrel

Not compatible with Performance Center Models
Does not fit the Smith & Wesson SW9VE
Only compatible with 9mm & .40
*If your M&P has a manual safety, it needs to be removed for compatibility

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