First-Time AR-15 Build: Where to Start?

[rg115]

Been mulling over building my first AR-15 and I'm finally diving into the parts shopping. There seem to be some decent deals out there, but honestly, I'm a bit lost on what's actually worth it. I'm aiming for a basic rifle build, thinking I'll stick with 5.56 since it seems like a solid choice for beginners. But if anyone has other suggestions, I'm all ears.

Are there certain brands that I should definitely steer clear of? Also, what hidden costs have you run into? I've heard stories about rookie mistakes — like forgetting to order a specific part or getting something that doesn't fit. Should I just bite the bullet and buy a fully assembled one instead?

Would love to hear any advice you have, especially those lessons you learned the hard way. Every bit helps!

 

[Hamden]

I own and have built Rock River exclusively. Actually "assemble" is more like it. All the parts have been drop-in.

 

[lihpster]

From Palmetto State Armory, you can buy full kits, only thing needed is a stripped lower. You can also get those from PSA, but since it has to go through a local FFL anyway, I prefer to buy that part from a local business. I have built a couple of ARs this way and they are good rifles. No worries if you got all the parts and if they'll work together. Fairly inexpensive way to get started. Resale value is not what it would be on a name brand gun, but it starts out at less money to begin with. Worth looking into.

 

[Bulzye]

Here's some points I'd like to share, although these are just a start.

When purchasing items for your build, be weight conscious of each part. "Ounces Is Pounds" and you don't want a heavy pig of a rifle. The lighter quality parts like some made from titanium are more expensive than steel but at nearly half the weight. Handguards for example can vary greatly in weight with some using a steel barrel nut versus alloy.

Buy quality brands when you can because fit, finish and quality of the part will usually be better than their cheaper counterparts.

Accuracy will mostly come from the upper receiver, bolt carrier group and barrel so bear that in mind when buying quality vs cheaper parts.

The trigger is one of the most underestimated items on an AR and can make a huge difference on whether it's a pleasure to shoot or a rough unpredictable one. Plan on spending a little extra on the trigger group and you'll be happy you did.

I'd stick with a Mil-Spec buffer tube over Commercial. Mil-Spec is slightly smaller diameter than Commercial and the butt stock needs to match the buffer tube.
I personally like a fixed trigger guard on the lower receiver, otherwise you get to hammer in roll pins to attach trigger guard.

If you're thinking about building a .223/5.56, I'd opt for a .223 Wylde which shoots both, but has a shorter freebore and subsequently a fuzz better accuracy.

When assembling, make sure to follow manufactures directions and torque specs, especially the barrel nut and handguard. Also use the correct tools for the job. Using a barrel extension torque tool with the proper barrel nut wrench will keep from stressing the upper like when using a magwell jig. (that's a no-no)

Lastly, after build, you want the rifle to eject spent cases between the 3-4 o'clock positions, so adjust accordingly

There's lots of intimidating things when you start out but go slow, pay attention, read, take notes, have fun and enjoy something you built yourself!

Happy Shooting!

 

[Beaver_TrekX9]

Do not cheap out on the bolt carrier group. A solid BCG makes or breaks reliability. PSA premium is fine if budget is tight.