The M&P 15 is a solid AR-15 platform, but let’s be honest, it can be even better. Swapping out a few key components can dramatically improve its performance, handling, and overall enjoyment. Think tighter groupings at the range, quicker target acquisition, and a more comfortable shooting experience. I’ve tinkered with my own M&P 15 for years, and these are the upgrades I’ve found make the biggest difference. Whether you’re looking for improved accuracy, better ergonomics, or enhanced reliability, there’s an upgrade here for you.
Quick Summary: Top M&P 15 Upgrades
- Trigger: A crisp trigger makes a huge difference in accuracy.
- Optic: Red dots or scopes speed up target acquisition.
- Handguard: Free-floating handguards improve accuracy and add rail space.
- Stock: A better stock enhances comfort and recoil management.
- Grip: An ergonomic grip improves control and reduces fatigue.
Top 5 Best M&P 15 Upgrades
1. Timney Triggers AR-15 Trigger
The Timney AR-15 Trigger is a drop-in replacement that transforms the feel of your rifle. This trigger offers a crisp, clean break and a short reset, making it easier to shoot accurately and quickly. It’s a single-stage trigger, pre-set to a comfortable pull weight, and known for its reliability.
Pros:
- ✅ Drop-in installation is relatively easy.
- ✅ Noticeably improves accuracy and reduces trigger slap.
- ✅ Consistent and reliable performance.
Cons:
- ❌ Can be more expensive than other trigger options.
- ❌ Some users may prefer a two-stage trigger.
- ❌ Adjustment isn’t possible (pre-set pull weight).
Verdict: If you’re serious about improving your M&P 15’s accuracy and trigger feel, the Timney AR-15 Trigger is a worthwhile investment. It’s a great upgrade for target shooters and anyone looking for a more refined shooting experience.
2. Holosun HS510C Red Dot Sight
The Holosun HS510C is a versatile red dot sight with multiple reticle options. It features a solar failsafe, so it will keep working even if the battery dies. The shake-awake feature saves battery life, and the durable construction can handle tough conditions.
Pros:
- ✅ Multiple reticle options (dot, circle-dot).
- ✅ Solar failsafe ensures the sight is always ready.
- ✅ Shake-awake feature extends battery life.
Cons:
- ❌ Can be slightly bulky compared to smaller red dots.
- ❌ Some users may find the reticle too busy.
- ❌ Price point is higher than some budget red dots.
Verdict: The Holosun HS510C is a great all-around red dot sight for the M&P 15. It’s suitable for a wide range of applications, from target shooting to home defense.
3. Midwest Industries M-LOK Handguard
The Midwest Industries M-LOK Handguard is a free-floating handguard that enhances accuracy and provides ample mounting options. Its free-float design isolates the barrel from the handguard, improving accuracy. The M-LOK slots allow you to attach accessories like lights, lasers, and grips.
Pros:
- ✅ Free-floating design improves accuracy.
- ✅ M-LOK slots offer versatile accessory mounting.
- ✅ Lightweight and durable construction.
Cons:
- ❌ Installation may require some gunsmithing skills.
- ❌ Can be more expensive than drop-in handguards.
- ❌ May need a low-profile gas block for clearance.
Verdict: The Midwest Industries M-LOK Handguard is a great upgrade for shooters who want to improve their M&P 15’s accuracy and customize it with accessories. It’s a worthwhile investment for serious shooters.
4. Magpul MOE SL-K Carbine Stock
The Magpul MOE SL-K Carbine Stock is a lightweight and minimalist stock that offers improved comfort and control. It has a slim profile and a non-slip buttpad, making it comfortable to shoulder. The SL-K is also adjustable for length of pull, allowing you to customize the fit to your body.
Pros:
- ✅ Lightweight and compact design.
- ✅ Adjustable for length of pull.
- ✅ Comfortable cheek weld.
Cons:
- ❌ Minimalist design may not appeal to all users.
- ❌ Limited storage options compared to some other stocks.
- ❌ Cheek weld might be too low for some optics setups.
Verdict: The Magpul MOE SL-K Carbine Stock is a great choice for shooters who want a lightweight and adjustable stock that provides improved comfort and control. It’s ideal for those who value a streamlined setup.
5. BCM Gunfighter Mod 3 Pistol Grip
The BCM Gunfighter Mod 3 Pistol Grip is an ergonomic grip designed to improve control and reduce fatigue. It features a more vertical angle than the standard A2 grip, which can be more comfortable for shooters with modern shooting stances. The textured surface provides a secure grip, even in wet conditions.
Pros:
- ✅ Improved ergonomics for better control.
- ✅ Aggressive texture for a secure grip.
- ✅ More vertical angle for modern shooting stances.
Cons:
- ❌ May not be suitable for shooters who prefer a more traditional grip angle.
- ❌ Texture can be abrasive for some users (easily remedied with gloves).
- ❌ No storage compartment.
Verdict: The BCM Gunfighter Mod 3 Pistol Grip is a great upgrade for shooters who want a more comfortable and controllable grip on their M&P 15. It’s especially beneficial for those who use a modern shooting stance.
Buying Guide
Choosing the right upgrades for your M&P 15 depends on your individual needs and shooting style. Here are a few things to consider:
- Budget: Upgrades can range from relatively inexpensive to quite pricey. Set a budget before you start shopping so you don’t overspend.
- Intended Use: Are you primarily using your M&P 15 for target shooting, home defense, or hunting? The best upgrades will vary depending on your intended use.
- Skill Level: Some upgrades, like triggers, can be more beneficial for experienced shooters who can appreciate the nuances of a lighter, crisper trigger pull.
- Compatibility: Make sure any upgrades you purchase are compatible with your M&P 15. Pay attention to things like gas system length and handguard compatibility.
- Installation: Some upgrades are easy to install yourself, while others may require the assistance of a qualified gunsmith. Consider your own skills and comfort level before tackling any installation projects.
Think about the specific areas where you want to improve your M&P 15. Do you want better accuracy? Improved handling? More accessory mounting options? Once you’ve identified your priorities, you can start researching the best upgrades for your needs.
FAQs
Q: What’s the first upgrade I should make to my M&P 15?
A: A trigger upgrade is often the most impactful first upgrade. It can dramatically improve your accuracy and shooting experience.
Q: Do I need to be a gunsmith to install these upgrades?
A: Some upgrades, like drop-in triggers and pistol grips, are relatively easy to install yourself. Others, like handguards, may require more specialized tools and skills.
Q: Will these upgrades void my M&P 15’s warranty?
A: It depends on the specific upgrade and the terms of your warranty. Check with Smith & Wesson or a qualified gunsmith to be sure.
Q: How much should I expect to spend on upgrades?
A: The cost of upgrades can vary widely, from a few dollars for a new pistol grip to several hundred dollars for a high-end optic or trigger. Set a budget and stick to it.
Q: Are there any legal restrictions on M&P 15 upgrades?
A: Yes, it’s important to be aware of any federal, state, and local laws that may restrict certain upgrades, such as suppressors or short-barreled rifles. Always comply with all applicable laws.
Conclusion
Upgrading your M&P 15 is a great way to customize your rifle and improve its performance. From triggers and optics to handguards and stocks, there are a wide range of options available to suit your needs and budget. By carefully considering your priorities and doing your research, you can transform your M&P 15 into the perfect rifle for you. So, get out there and start building your dream AR-15!
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