20 Gauge Pardner Pump Pistol Grip Magpul ACS-L Stock MILSPEC Black 6 Position Tactical


Tactical Collaboration Defense + Magpul ACS-L  Kit Telescoping Buttstock w/ Adaptor, Tube & Castle Nut Pardner Pump 20 Gauge Shotgun (Stock Included )

Lucy™ Adapter for 20 GA Shotguns (Rem 870)

Mesa Tactical’s Lucy™ adapter dramatically increases the number and type of butt stocks that can be used with 20 gauge Remington 870 shotguns. Attached at the receiver in place of the standard 20 gauge stock, this cast steel adapter enables the use of any 12 gauge Remington 870 stock. There are many more options for the 12 gauge than 20 gauge, including Mesa Tactical’skits and even the Hydraulic Buffer system.

The Lucy Adapter simply bolts to the back of a 20 gauge 870 receiver, allowing the 12 gauge stock to then rigidly bolt to the adapter. This greatly increases the options and availability of butt stocks for the 20 gauge shotgun. The 20 gauge Remington 870 is an excellent platform for personal defense, but it suffered from fewer tactical butt stock offerings than its 12 gauge counterpart. The Lucy Adapter solves this problem.


“The ultimate kit for a home defense shotgun builder”
About the Stock:
-The ultimate upgrade for the home defense shotgun builder.
-Made in the USA by Magpul.
-Fits Milspec tube.
-Aluminum tube included
-Excellent around tight corners and home home or office.
-The ultimate tactical shotgun setup, ideal for your home-defense gun.

-Perfect for Telescoping stock with adjustable length of pull, adjusts to thick clothing or body armor.

-Milspec tube and Milspec castle nut included (no spring required)



The Magpul ACS-L (Adaptable Carbine Stock – Light) Mil-Spec is a drop-in replacement buttstock for AR15/M4 carbines using Mil-Spec sized receiver extension tubes. A streamlined version of the ACS, the ACS-L utilizes the same center storage compartment and cheek weld but removes the battery tubes for a slimmer, lighter weight package.


Made in the USA.



Sloping cheek weld provides a wide contact surface for user comfort




Mounts on Mil-Spec sized carbine receiver extension tube (not included) from manufacturers such as Colt, Armalite, S&W, LMT, and others (please see the note below).


Storage compartment in tail of stock with positive latching access door on right hand side




Supplemental friction lock minimizes accuracy robbing wobble*. Shielded release latch prevents snagging and accidental operation




Replaceable rubber 0.3″ Rubber Butt-Pad offers an anti-slip surface and increases impact protection



Compatible with Magpul ASAP®, ASAP® QD, and other receiver-mount sling attachments


Sling Mounts:


Mid – Included reversible Sling Mount Kit -TYPE 3 fits up to 1.5″ push-button swivels (swivel not included)


Rear/Bottom – 1.00″ sling loop




Premium chrome-silicon lock spring provides positive locking and long service life






Export Administration Regulations Controlled Product


EXPORT NOTICE: This is an item controlled for export by the Export Administration Regulations (EAR) under the Commerce Control List (CCL). These controls take the form of export regulations and license requirements. As part of the express consideration provided for receipt of Magpul’s goods, technical data and/or services, you, our customer, acknowledge that the export, re-export or other transfer, directly or indirectly, of the goods, technical data and/or services provided by Magpul in violation of U.S. law is prohibited. Customers acquiring controlled goods, technical data and/or services from Magpul shall be responsible for obtaining any necessary U.S. or other government authorization required to ensure compliance with applicable export laws. (See Magpul Shipping and Returns FAQ for more information).


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




More Information
Platform AR10, AR15, M4, M16, M110, SR25
Compatibility Mil-Spec sized carbine receiver extension tube (not included) from manufacturers such as Colt, Armalite, S&W, LMT, and others
LOP, M4 Collapsed ~11.6 in.
LOP, M4 Extended ~14.9 in.
LOP Adjustment Range 3.3 in.
Length, max 8.0 in.
Weight 12.5 oz.
Weight, w/ receiver extension 16.5 oz.
Width, max 2.2 in.
Other Specs * Friction lock performance may vary depending on the host receiver extension’s dimensional tolerances.

** Specifications based on standard-length (flat-back) M4 Carbine Receiver Extension and may vary depending on tube manufacturer.

NOTE: There are two basic sizes of M4 Carbine receiver extensions (buffer tubes): Mil-Spec and Commercial-Spec. If you have a Commercial-Spec extension on your rifle, make sure to order.


Technical Information: 

Mil-Spec Stock:

  • Tube Diameter: 1.145″ to 1.150″
  • Weight: 0.50 LB
  • Length of Pull: 10.70″ to 13.95″
About the AIM Tactical Adaptor:
-Zytel Construction
-Lifetime warranty
SYSTEM CONCEPT AND PRODUCT OVERVIEW:The most important capability of these adapters is to facilitate the use of collapsing or telescoping stocks, which provide a shorter length of pull (LoP) than the factory stock, which is especially important for law enforcement or “tactical” operators. In addition, these stock adapters accept a hydraulic buffer from Crosshair™ that reduces felt recoil. The AIM is by far the most effective of several shotgun stock systems on the market.

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