Load up that Cart! UPS Ground is only $8.99, Regardless of Weight! (Click for details)


Starting at: $24.95

This product ships FREE via US Postal 1st Class, and will ship separately from the rest of your order.

This product is also available for sale on Amazon.com: https://www.amazon.com/Exile-Machine-Headbutt-SGW-515-Shotgun/dp/B01MUKA3SB

Typical configuration w/Hogue overmold stock (photo shows early prototype):

The Headbutt™ adapter replaces the pistol grip on your AR-15, allowing it to mate to a Mossberg 500™ compatible stock (Will not fit any other type of shotgun stock). In operation it feels very much like holding a wooden rifle, except that you'll find your neck is less cramped.

This product is manufactured from injection molded glass filled nylon to survive the most challenging missions.



  • Mass: 60g without hardware
  • Overall Dimensions: 47x47x35mm
  • Tensile Strength: >197MPa
  • Flexural Modulus: >9.7GPa
  • Material: 33% Glass Filled Nylon
  • Max operating/storage temperature: 245C

(Specifications are subject to change without notice.)

Shoulders up tight. Solid cheek weld on the buffer tube w/ excellent acquisition of sights.

The Headbutt™ is engineered and tested to work with mil-spec forged AR pattern lower receivers. While the design may work with billet lowers, these lowers often have wide variances in dimensioning that could impact the fit of this adapter. It may be necessary to modify it to fit on any given billet lower.  Modifications of course void the warranty.

Mounting Hardware

AR-15 pistol grip mounting screw (1/4-28 x 7/8" socket head cap screw) and matching 1/4" steel washer included. Shotgun stock mounting washer and 5/16-18 nylock nut are also included.Depending on the particular stock you use, you may need to purchase a slightly longer shotgun stock mounting bolt than what came with your stock. Some typical Mossberg 500 shotgun stock mounting details are spelled out below.

  • Magpul SGA® Stock P/N MAG490: To attach this stock requires a 5/16-18 x 1.25" Socket head cap screw, which is a bit longer than the screw provided with the Magpul stock. This longer screw is available as an option from the menu below.

  • Hogue 12" LOP Overmold Stock: This stock requires a 5/16-18 x 6" hex bolt and two 5/16 crush washers (used as spacers) between the bolt head and the washer supplied with the stock.  This longer screw is available as an option from the menu below. Use the washer that came with the stock between the stock and the crush washers.

  • Phoenix Technologies Kicklite: This stock requires a socket head screw 5/16"-18 by 3-3/4" Long. Re-use the washer that comes with the stock.

  • Original Factory Mossberg 500 wood stock This stock requires a 5/16-18 x 6" hex bolt and three 5/16 crush washers (used as spacers) between the bolt head and the stock.  This screw and washer set is available as an option from the menu below.

  • Mossberg 500 Synthetic Stock This stock requires a 5/16-18 x 6" hex bolt. Reuse the flat washer and crush washer that came with the stock. This screw is available as an option from the menu below.

This product carries our 90 day no questions asked, no hassle warranty. If for any reason you aren't thrilled with the performance of this item, simply return for a full refund within 90 days. Five year warranty against defects in materials or manufacturing.

This product 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.

Typical configuration w/Magpul MAG-490 SGA stock (photo shows early prototype):

This product is not approved or endorsed by O.F. Mossberg & Sons, Inc.

Product Options:

Add to Cart:

  • Part Number: #EXM-SGW-515-BLK
  • Plenty in Stock
  • Manufactured by: Exile Machine LLC

Qty Discounts Off Price
* Discounts may vary based on options above
Copyright © 2017 Exile Machine.
Merchant Services