Description
The Magpul STR (Storage/Type Restricted) is a Mil-Spec AR15/M4 carbine stock built on an A-frame profile that adds two water-resistant storage tubes, each holding up to two CR123A or AA batteries. The ambidextrous release latch works with a friction-lock system for a tight, quiet fit, a chrome-silicon lock spring resists wear, and an integral QD sling socket with two footman’s loops covers sling options. The sloping cheek weld and 0.30 in anti-slip rubber butt-pad finish it off. Specifications from Magpul: 12.6 oz stock only (about 16.4 oz with receiver extension), 7.3 in long, 5.2 in high, 2.6 in wide, length of pull about 10.7 in collapsed to 14.0 in extended (3.3 in range). Choose Black or Flat Dark Earth.
Key features
- A-frame profile with two water-resistant storage tubes (two CR123A or AA each)
- Ambidextrous release latch with friction-lock system; chrome-silicon lock spring
- Integral QD sling mount plus two footman’s loops
- Sloping cheek weld; 0.30 in anti-slip rubber butt-pad
- Weight 12.6 oz stock only (~16.4 oz with receiver extension); length 7.3 in, height 5.2 in, width 2.6 in, butt 1.7 in
- Length of pull ~10.7 in collapsed / ~14.0 in extended (3.3 in range)
- Polymer with rubber components; fits Mil-Spec carbine receiver extensions; Magpul code MAG470; made in the USA
Frequently asked questions
What does STR stand for?
Storage/Type Restricted — Magpul’s name for the A-frame carbine stock with storage tubes.
Will the STR fit a commercial buffer tube?
No. MAG470 is the Mil-Spec version and fits Mil-Spec carbine receiver extensions.
How does the STR differ from the CTR?
Per Magpul, the STR adds battery storage tubes to the friction-locking CTR-style design.
Specifications from Magpul (magpul.com).
Firearm parts and accessories are supplied by 3 Gun Tactical, Licensed Firearms Dealer 50001578, Tingalpa QLD. Check your state’s firearm-parts and magazine rules before ordering.









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