Adaptive Tactical Stocks and Forends

EX Performance Stock and M4-style Forend for Mossberg

EX Performance
Forend and M4-Style Stock for Mossberg Shotguns


Optimized for pump shotguns, the advanced design features and high-impact, polymer construction of the EX Performance Adjustable Stock and Forend make it an ideal choice when upgrading your Mossberg 500 & 88*, 590 series 12g pump shotgun.

The EX Performance Forend features a 2 inch picatinny rail concealed under the nose cap. Uncovered it’s ideal for attaching tactical accessories like lasers or lights. Constructed of durable of high performance, lightweight polymer.

The EX Performance M4-style Stock with pistol grip features an easy-to-reach rapid adjust lever for custom length-of-pull, and includes an integrated QD swivel attachment and molded in non-rust standard sling swivel attachment. Durable polymer construction with non-slip vented rubber recoil pad, oversized extra strength adjustment pin, and sleek industrial design.

The EX Performance stock set is available for the Remington 870 12g. A drop-in replacement AR Rear Stock (RAS) is also available for AR15/M4 carbines or other shotguns/rifles utilizing Mil-Spec sized extension tubes.

Retail packaging


$119.99 / $159.99
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  • Designed for owner installation
  • Accessory rail concealed under forend nose cap
  • M4-style stock with pistol grip and adjustable length-of-pull
  • Integrated sling attachment points
  • Available in Black and popular Camo patterns
  • Compatible with Mossberg 500 & 88*, 590 series 12g pump shotguns
  • Maverick 88 and shotguns with integrated action bars requires purchase of forend slide assembly


Compatibility Stock dimensions Forend dimensions Weight Documentation
Mossberg 500/88*, 590 12g 2"x6"x10 1/2" 2 1/4" x 2 1/8" x 9 3/4" 1.98 lbs. Installation Guide
Adjustment L.O.P. (with recoil pad) L.O.P. (without recoil pad)
Six increments, 5/8" on center 11.5" – 14.5" 10.5" – 13.5"

*Note: Mossberg Maverick 88 and other shotguns with integrated action bars require the purchase of a forend slide assembly from Mossberg or an online parts retailer.