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RT15 Poly Complete Lower Receiver

RATTLESNAKE TACTICAL GEAR
122 Reviews
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In stock

SKU RT15-POLY-CL-A

Product Details

The RT15 Poly complete lower features a uniquely lightweight and sturdy design.

This lower receiver is made from a rugged and lightweight polymer material, providing a lightweight and reliable base for your custom AR.

Compatible with any standard mil-spec components, this lower allows you to drop in your favorite AR-15 upper to create a complete rifle. 

  • Complete Lower Receiver
  • Collapsable, 6-position stock
  • Integrated oversized trigger guard
  • Ultra-lightweight
  • Rugged polymer trigger group
  • Extremely tough polymer buffer tube
  • Great for custom AR-15 builds
  • Three-year factory warranty

For marksmen with heavy optics and accessories ranging from bipods to suppressors, every ounce of weight savings can count.

This is especially true if you ever plan to hike with your rifle to hunt or carry in the wilderness.

Tactical shooters who enjoy shorter barrel lengths and smaller optics appreciate the lightweight lower as it allows for quicker handling, and will fatigue your arms and shoulders less when holding the rifle at the ready.

Do yourself a favor and start your next build off by saving precious ounces on the lower receiver, as forged or milled lowers need expensive machining and skeletonization to reduce their weight.

Looking for some magazines to pair with your new RT15 Complete Lower? Shop our online section of AR15 Magazines to score big savings and fast shipping!

*This polymer lower does not need to have its castle nut tightened, torqued, or staked, as it is factory torqued to 6-8 lbs with blue Loctite and will not come loose.

More Information

Category Guns
Manufacturer SKU RT15-POLY-CL-A
Condition New
Suggested Use Practice, Self Defense, Hunting / Varmint, Competition / Sport
Color Black
Manufacturer Rattlesnake Tactical

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Reviews (122)

4.8
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122 Reviews
5% of customers
recommend this product
5 stars
5 (83%)
4 stars
0 (0%)
3 stars
1 (17%)
2 stars
0 (0%)
1 star
0 (0%)
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RT15 Poly Complete Lower Receiver
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Customer Reviews

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Zoohead
Jan 30, 2025
Verified Buyer
I recommend this product
YEP
Advantages
Couple hundred rounds and I pushed it kind of hard a few times, and it worked just fine, weight spot on! Going to play with this one and probably buy a couple more. Great product!
Comment
Great lower!
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PigDynasty
Jan 11, 2025
Verified Buyer
I recommend this product
I have had this lower for two years. I use a 350 l...
Advantages
Light weight and works
Comment
I have had this lower for two years. I use a 350 legend upper. Great lower.
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Tim
Dec 8, 2024
I recommend this product
I would definitely recomend this lower for anyone ...
Advantages
I was skeptical at first but I quickly changed my mind. This lower has one of the best factory triggers I have ever shot. And it weighs hardly anything
Disadvantages
No disadvantages discovered at this time
Comment
I would definitely recomend this lower for anyone wanting a light lower with a great trigger
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Catfish
Jun 12, 2024
Verified Buyer
I recommend this product
Durable and light weight lower for a good price.
Advantages
Light weight and you can't beat the price.
Comment
I've just bought 2 more. For those wondering about durability, I've had one of these lowers for a year and a half. It has ran 500 rounds out of my .458 SOCOM with no issues.
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Mike C
Jan 9, 2024
Verified Buyer
I recommend this product
I have 4 of them ...
Advantages
Lightweight fits well
Comment
I have 4 of them on different caliber uppers. All of them shoot well and I haven't had any issues. Calibers I paired them with: 300 BO 7.62x39 410 shotgun 5.56
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Buck
Jan 8, 2024
Verified Buyer
I don't recommend this product
Works OK with brass rounds
Advantages
It is light weight
Disadvantages
will not advance steal cased ammo. One shot and your jammed up.
Comment
Works OK with brass rounds
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T
Nov 9, 2023
Verified Buyer
I recommend this product
It's definately not you regular AR.
Advantages
Lightweight, economical, functional
Disadvantages
feels preety cheap, fit and finish is not the best.
Comment
When they say that this is made of composite (plastic) it is Anything that can be made from it, are. It is very functional, question is, will it holdup?
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Dennis Cline
Jan 22, 2023
Verified Buyer
Works exactly like it should.
Works exactly like it should. I paired it with a .350 legend upper and I have been very pleased.
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Scott Kravatz
Jan 13, 2023
Verified Buyer
Excellent price
Fits my upper perfectly. Haven't been to the range yet to test it. The only downside is it so inexpensive that it's hard to pay the $50 FFL fee when the lower is only $100. Can't be the price.
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Daniel Apodaca
Jan 13, 2023
Verified Buyer
So far worked great, light
So far worked great, light weight and matched up perfect with my upper.
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California Prop 65 Warning  WARNING for California Residents WARNING: Discharging firearms in poorly ventilated areas, cleaning firearms, or handling ammunition may result in exposure to lead and other substances known to the State of California to cause birth defects, reproductive harm, and other serious physical injury. Have adequate ventilation at all times. Wash hands thoroughly after exposure. For more information go to www.p65warnings.ca.gov/.