Backfin™ Finned Backstrap

Fits Magpul MIAD® v1.1 Grips

Assertive Weapon Control

Please click the photo above to purchase.

Backfin™ replaces the backstrap for the Magpul MIAD® Gen 1.1 (Type 1 (AR-15) or Type 2 (AR-10)) pistol grip on your AR pattern rifle, featuring a sturdy fin that blocks your hand from wrapping around the grip, and an integral Thumbshelf for assertive weapon control.

For Magpul MIAD Gen 1.1 grip only. This product does not fit any other grip, including the v1.0 MIAD, which has a different backstrap mounting geometry. This product requires but does not include the Magpul MIAD grip, purchased separately.

Integral Thumbshelf helps retain Positive Weapon Control. Magpul MIAD grip shown is not included

Comfortable secure hold

This product is manufactured in the USA from a proprietary aliphatic polyester compound, via fused deposition manufacturing (3D filament printing).


  • Material: Aliphatic Polyester
  • Weight: 50g
  • Dimensions: 49x97x108mm
  • Tensile Strength: 52MPa
  • Modulus of Elasticity: 2940MPa
  • Max Temp: 80C

(Specifications are subject to change without notice.)

This product is engineered and tested to work with mil-spec forged AR lower receivers. While the design may work with billet lowers, these lowers often have wide variances in dimensioning that could possibly impact the fit of this product.

Backfin™ carries our 90 day no questions asked, no hassle warranty. If for any reason you aren't thrilled with the performance of this product, return to place of purchase for refund. One year warranty against defects in materials or manufacturing.

Installation & Removal Instructions

Backfin™ has not been approved for legal compliance by any state or local firearms regulatory authority. Please consult with a competent firearms attorney before attempting to make your rifle compliant with state or local assault weapons ban laws.

Magpul MIAD® grip kit sold separately

MIAD® is a registered Trademark of Magpul Industries.

This product is neither approved nor endorsed by Magpul Industries.

Store product out of direct sunlight.