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AR-15 Collapsible Stock | Adjustable & 6-Position AR Stocks
AR-15 Collapsible Stock – Adjustable, 6-Position & Mil-Spec Fit
Looking to upgrade your AR-15 with a dependable, adjustable stock? A collapsible stock is one of the most effective improvements you can make — offering control, comfort, and flexibility in a single upgrade. Whether you're building for tactical use, competition, or personal defense, Mounts Plus has you covered with a full lineup of mil-spec and commercial AR-15 collapsible stocks.
We carry trusted brands like Magpul, FAB Defense, ATI, VISM, and UTG, all tested for durability, fit, and function. Choose from 6-position stocks, recoil-reducing models, or lightweight options designed for fast handling.
🔧 Why Choose a Collapsible Stock for Your AR-15?
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✅ Adjustable Fit – Easily change the length of pull for body armor, stance, or different shooters
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✅ Tactical Versatility – Ideal for home defense, vehicle use, or short-range tactical work
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✅ Lightweight Options – Shave ounces without sacrificing strength or stability
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✅ Direct Drop-In – Most models install easily on standard AR-15 buffer tubes with no gunsmithing
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✅ Mil-Spec & Commercial Options – Match your buffer tube for proper fit
⭐ Best-Selling AR-15 Collapsible Stocks
We stock a wide range of adjustable AR stocks to meet every shooter's needs:
| Model | Fitment | Features |
|---|---|---|
| Magpul MOE SL | Mil-Spec | Compact, minimalist, ergonomic |
| FAB Defense GL-Core S | Mil-Spec/Commercial | Rubberized buttpad, CQB design |
| ATI TactLite | Mil-Spec | Lightweight, adjustable cheek riser |
| VISM Tactical with Cheek Riser | Mil-Spec | Adjustable comb height |
| UTG PRO 6-Position Stock Kit | Mil-Spec | Includes buffer tube and spring |
🧩 Mil-Spec vs. Commercial: Know Your Fit
Before you buy, check your buffer tube:
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Mil-Spec: 1.14" diameter with flat back
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Commercial: 1.17" diameter with slanted back
🛠️ Quick Install Guide
Most collapsible stocks can be installed in minutes:
- Remove existing stock
- Slide on your new stock
- Lock in place at your desired position
- Check function and stability
No special tools or permanent modifications required.
🔗 Related AR-15 Parts & Accessories
To complete your build or upgrade your rifle setup, explore these essential AR-15 components that pair perfectly with our stock selection:
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🔧 Looking for a compatible tube? Browse our AR-15 buffer tubes — available in both Mil-Spec and Commercial sizes to match your stock perfectly.
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✋ Improve control and ergonomics with a custom AR-15 pistol grip, including vertical grips and textured designs for every shooter.
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🧩 Build or repair your lower with our AR-15 lower parts kits, including complete LPKs and fire control group options.
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⚙️ Looking for tactical enhancements? Discover a full range of AR-15 accessories like slings, mounts, tools, and add-ons that complement your stock setup.
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🛠️ Want a full breakdown of compatible parts? Our AR-15 parts page includes everything from triggers and buffer springs to ambidextrous upgrades.
Each link above helps you customize your rifle while keeping it functional, reliable, and compliant with your build needs.
❓ FAQs
Q: Are collapsible stocks legal on all AR-15s?
A: Yes, for standard rifles. However, attaching one to a pistol or SBR may require NFA compliance. Always check your local laws.
Q: What's the difference between mil-spec and commercial stocks?
A: Mil-spec stocks fit a 1.14” diameter buffer tube and are more standardized. Commercial tubes are slightly larger at 1.17” and require matched parts.
Q: Do these stocks include buffer tubes?
A: Most are standalone stocks. Kits with tubes and hardware are noted in the product title.
Q: Can I install these myself?
A: Yes. Most collapsible AR-15 stocks install in under 10 minutes with no gunsmithing.
🛒 Order Your AR-15 Collapsible Stock Today
From tactical performance to lightweight precision, Mounts Plus has the adjustable AR-15 stock to match your build. Fast shipping. Trusted brands. Expert support.