Magpul STR Carbine Stock Mil-Spec for AR15/M16 with Battery Storage Compartments
The Magpul STR (Storage/Type Restricted) Carbine Stock Mil-Spec is an ergonomic telescoping stock designed for AR-15/M4 platforms. It combines enhanced stability, an enlarged cheek weld, and integrated waterproof storage compartments. Based on the popular CTR stock, the STR offers additional functionality for users who require secure storage, a solid lock-up, and improved comfort during extended firearm use.
The stock is compatible exclusively with Mil-Spec receiver extension (buffer) tubes and fits AR15, M4, M16, AR10, SR25, and M110 platforms.
Reinforced Construction and Secure Lock-Up
The stock features Magpul's signature A-frame profile, which helps reduce snagging on gear and equipment during movement. Its body is manufactured from reinforced impact-resistant polymer designed to withstand intensive field use.
For an exceptionally tight fit, the stock incorporates the Friction Lock system, minimizing movement on the buffer tube and providing a rigid lock after length adjustment. This enhances weapon stability and improves shooting consistency.
A protected ambidextrous adjustment lever prevents accidental activation while allowing quick length adjustment, even when wearing gloves.
Integrated Waterproof Storage
A key feature of the STR stock is its pair of waterproof storage compartments located on both sides of the cheek weld.
Each compartment accommodates:
- up to two CR123A batteries;
- or up to two AA batteries.
The compartments are accessed from the rear of the stock through rubber-sealed caps that are easy to remove by hand while protecting the contents from dust and moisture.
Enhanced Ergonomics
The sloped cheek weld provides a larger contact surface, allowing a more comfortable and consistent shooting position. Despite its increased cheek support, the stock maintains a compact profile that works well with tactical gear and helmets.
The buttpad features a replaceable 0.30 in (0.76 cm) rubber recoil pad that:
- reduces slipping against clothing and gear;
- improves weapon control;
- helps absorb part of the recoil.
Sling Mounting Options
The stock supports multiple sling attachment methods and is compatible with:
- Magpul ASAP®;
- Magpul ASAP® QD;
- other AR-platform sling attachment systems.
Attachment points include:
Rear: ambidextrous Type 1 QD socket for push-button sling swivels (supports slings up to 1.5").
Rear/Bottom: dual loops for traditional tactical slings up to 1.25 in (32 mm) wide.
Key Features
- compatible with Mil-Spec receiver extension tubes;
- integrated waterproof battery storage compartments;
- Friction Lock system eliminates stock wobble;
- enlarged ergonomic cheek weld;
- protected ambidextrous adjustment lever;
- reinforced impact-resistant polymer construction;
- non-slip rubber buttpad;
- multiple sling attachment options;
- compact A-frame profile.
Specifications
Type: Telescoping stock with integrated storage compartments
Compatible platforms: AR15, M4, M16, AR10, SR25, M110
Compatibility: Mil-Spec receiver extension (buffer) tubes only (including Colt, Armalite, Smith & Wesson, LMT, and others)
Maximum stock length: 7.3 in (18.5 cm)
Length-of-adjustment range: 3.3 in (8.4 cm)
Length of Pull (LOP) on an M4 carbine:
- collapsed: approximately 10.7 in (27.2 cm);
- extended: approximately 14.0 in (35.6 cm).
Maximum height: 5.2 in (13.2 cm)
Maximum width: 2.6 in (6.6 cm)
Maximum buttpad width: 1.7 in (4.3 cm)
Buttpad thickness: 0.30 in (0.76 cm)
Weight: approximately 357 g (12.6 oz); approximately 465 g (16.4 oz) with receiver extension
Material: Reinforced polymer
Country of manufacture: USA
NSN: 1005-01-619-8860 (also 1005-01-619-8862 and 1005-01-619-8863)
The Magpul STR Mil-Spec is a modern telescoping stock for AR-platform rifles that combines outstanding ergonomics, secure lock-up, and integrated waterproof storage compartments. It delivers enhanced comfort, improved weapon handling, and practical storage for essential accessories during training, duty, or professional shooting applications.
