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Masterpiece Arms MPA20-SST9 Defender Centerfire Rifle

Item # 721442
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Additional Information:

Prices, promotions, styles and availability may vary by store and online.

  • To buy online and deliver to a Gander Mountain store or an Independent Firearms Dealer, simply add this item to your cart. Click here for additional details.
  • Firearms shipping charge of $25.00 per item.
  • You must be at least 18 years old to purchase this item. State and local laws may vary.


  • 16" Threaded Barrel w/ Muzzle Brake

  • Aluminum Quad-Rail

  • Top Mounting Rail

  • Low-Profile Buttstock

  • 30-Round Polymer Magazine

Product Summary

The MPA20-SST from MasterPiece Arms is a MAC-10-inspired, side-cocking carbine rifle with AR15-style enhancements. The centerpiece of the American-made MPA20 is a 16" threaded barrel with a muzzle brake that comes melded to an aluminum quad-rail, providing the perfect platform for a large variety of available accessories. The quad-rail doubles as an AR-15 handguard and the MPA20 has another rail on top for optics mounting. Other features include: a low-profile buttstock, a 30-round polymer magazine, a mag-loader, and an adjustable front sight. Every rifle ships in a gun case and comes with a lifetime guarantee from Masterpiece Arms.

Model MPA20-SST9 Defender Carbine
Type Centerfire Rifle
Action Semi-Auto
Caliber 9MM Luger
Barrel Length 16"
Sights Adjustable Front
Finish: Stock Black Synthetic
Finish : Barrel & Receiver Black Steel
Safety Lever
Capacity 30 + 1