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Will An Ar-15 Trigger Fit An Ar-10? What To Watch Out For

If you’re a gun owner, you’ve probably heard about AR-10 rifles. Maybe you’ve even seen one in person. But do you know how to tell if your AR-15 parts will fit an AR-10?

An AR-15 trigger will fit an AR-10. In order for your AR-15 parts to fit into an AR-10, they have to be the same size. If they’re not, then you’ll need to get new ones that fit your rifle’s frame properly.

This can be as easy as buying different screws or pins so that you can assemble it with ease. Well, don’t worry—that’s why we’re here! We’ll explain what the difference is between these two guns and what parts work between them. So let’s get started!

Are Ar-15 And Ar-10 Parts Interchangeable?

The AR-15 and AR-10 are two different rifles that use the same parts. The two rifle platforms were designed to be interchangeable, but some parts will not work.

  • Lower receiver: you can use a lower receiver from an AR-15 in an AR-10 and vice versa
  • Buffer tube: you can use a buffer tube from either rifle platform in either rifle
  • Trigger guard: this part is not compatible between the two platforms

What’s The Difference In An Ar-15 And An Ar-10?

The AR-15 and the AR-10 are two different rifles. The AR-15 is a civilian rifle, while the AR-10 is a military rifle. In general terms, they’re similar in design: they both have an upper and lower receiver that can be swapped out for different parts (also known as “matching halves”).

They both use a gas operated system to operate their actions, which means that when you fire your weapon there’s some force pushing back on it to cycle the bolt or slide.

However, there are some differences between these two rifles worth noting before we dive into what makes them function differently from each other.

  • The AR-15 has a 5.56mm NATO chambering, while the AR-10 has a 7.62mm NATO chambering.
  • These two calibers are not interchangeable, meaning that you can’t use an AR-15 magazine in an AR-10 rifle and vice versa.

In addition to this difference in caliber, there are also differences in bolt design and length as well as barrel length.

I use either Brownells, Palmetto State Armory, or Optics Planet to buy parts, that way I always know what I’m getting and that it will actually show up.

How Do You Determine The Trigger Type For A Trigger Guard?

 The trigger guard is the part of the gun that surrounds the trigger. It has a curved shape and can be made out of different materials, such as plastic or metal. There are two types of trigger guards: fixed and adjustable.

  • Fixed trigger guards are the most common type of trigger guard and are used on all AR-15s and M16s.
  • They’re made out of metal or plastic and can’t be adjusted.
  • The shape is usually curved to fit around the finger, allowing for a more comfortable grip when firing the weapon.

Adjustable trigger guards are used on some AR-15s and M16s. They’re made out of plastic, aluminum or steel and can be adjusted to fit different sized fingers. The trigger guard is attached to the lower receiver via two screws that hold it in place.

Can You Use An Ar-15 Charging Handle On Ar-10?

You can use an AR-15 charging handle on an AR-10. The charging handles are completely interchangeable. Some manufacturers even sell them separately so you can have one that matches your rifle better than the original equipment. However, there are some things you should look out for if you’re going to make this swap:

  • Make sure the charging handle is compatible with your rifle.
  • If it isn’t, it won’t work at all and will probably cause damage to your weapon as well if it doesn’t fit correctly into the bolt carrier group (BCG).

If a part doesn’t fit properly into BCG, then BCG may not be able to function properly and could result in malfunctions during firing or even outright failure of the BCG itself due to wear and tear from misalignment of parts caused by using incompatible parts together with each other

Do Ar-15 And Ar-10 Use The Same Buffer Tube?

The buffer tube on an AR-15 and an AR-10 is the same. The buffer spring, however, is different. A standard AR-15 spring works with both the AR-15 and the AR-10.

The gas system in an AR-15 is shorter than that of an AR-10. This means that it will generate less recoil than its larger counterpart when fired with a similar weight of ammunition.

The gas system in an AR-10 is longer than that of an AR-10. This means that it will generate more recoil than its smaller counterpart when fired with a similar weight of ammunition.

The buffer tube spring on an AR-15 is shorter than that of an AR-10. This means that it will generate less recoil than its larger counterpart when fired with a similar weight of ammunition.

What Ar-15 Parts Work On Ar-10?

Many of the parts you need to assemble an AR-15 will also work on an AR-10, so there’s no need to worry about whether or not your favorite pre-built upper receiver will fit. In most cases, parts are interchangeable between the two platforms without issue.

  • The only exception is that some AR-10s use a thicker buffer tube to allow for heavier buffers and springs than can be used in standard AR-15s.
  • If your barrel extension is cut at different lengths from those made for standard buffer tubes, then you may not be able to use the same handguard as well.

AR-10s have a reputation for being powerful, accurate rifles. To live up to that reputation, they need to be built with quality parts that are properly assembled and tested. A lot of AR-15 parts will work on an AR-10 but there are some things you should watch out for.


To summarize, the AR-15 and AR-10 are very similar weapons and share more parts than you might think. That said, there are some key differences to be aware of when considering an upgrade or replacement part for your rifle.

The most important thing is knowing which trigger type fits your needs best and how to properly install it in order for everything else not only fit but also function properly as well!