+1-800-504-5897 Help Center Check Order Status
About Us Policies Reviews How To
Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

Armaspec .223/5.56mm Gun Builders Lower Parts Kit ARM151-BLK Color: Stainless/Black, Caliber: 5.56x45mm NATO, $5.00 Off w/ Free Shipping

Armaspec .223/5.56mm Gun Builders Lower Parts Kit, SS/Black, ARM151-BLK
Armaspec .223/5.56mm Gun Builders Lower Parts Kit, SS/Black, ARM151-BLK
1 of 1 images
Armaspec .223/5.56mm Gun Builders Lower Parts Kit, SS/Black, ARM151-BLK

Tap Tap to Zoom

Government Export Restriction Government Export Restriction
You May Also Like
Best Rated Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI571BLK-30RD
Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI571BLK-30RD
(57)
List: $24.99 $12.99 Save Up to 48%
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI557BLK-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI557BLK-30RD
(35)
List: $30.36 $14.99 Save Up to 51%
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI556BLK-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI556BLK-30RD
(52)
List: $32.43 $17.99 Save Up to 45%
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Black, 1 Pack, Polymer, MAG560BLK-20RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Black, 1 Pack, Polymer, MAG560BLK-20RD
(25)
List: $30.79 $21.49 Save Up to 30%
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Medium Coyote Tan, 1 Pack, Polymer, MAG556-MCT-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Medium Coyote Tan, 1 Pack, Polymer, MAG556-MCT-30RD
(52)
List: $32.43 $17.99 Save Up to 45%
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Medium Coyote Tan, 1 Pack, Polymer, MAG557-MCT-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Medium Coyote Tan, 1 Pack, Polymer, MAG557-MCT-30RD
(35)
List: $29.95 $14.99 Save Up to 50%
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Remington, 40 Round, Black, 1 Pack, Polymer, MGMPI233BLK-40RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Remington, 40 Round, Black, 1 Pack, Polymer, MGMPI233BLK-40RD
(12)
List: $42.33 $27.99 Save Up to 34%
Best Rated Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI570BLK-30RD
Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI570BLK-30RD
(13)
List: $31.04 $15.99 Save Up to 48%
Best Rated Strike Industries AR-15 .223 Remington/5.56 NATO Rifle Magazine, 33 Round, Smoke Gray, 1 Pack, Polymer, Smoke, 0, SI-AR-MAG-33RD
Strike Industries AR-15 .223 Remington/5.56 NATO Rifle Magazine, 33 Round, Smoke Gray, 1 Pack, Polymer, Smoke, 0, SI-AR-MAG-33RD
(11)
List: $17.95 $17.99 Save Up to 49%
Best Rated PMC Ammunition 556K X-Tac, 5.56x45mm NATO, 62 grain, Light Armor Piercing, Brass, Centerfire Rifle Ammo, 20, 5.56
PMC Ammunition 556K X-Tac, 5.56x45mm NATO, 62 grain, Light Armor Piercing, Brass, Centerfire Rifle Ammo, 20, 5.56
(113)
List: $14.99 $11.89 Save Up to 21%
Questions & Answers
Will this kit work in an Aero M5 (.308) lower? Expert Answer

Many of the parts will fit, while others will be to small to fit the larger lower receiver of a .308.

by Armando R., Gear Expert, March 1, 2020
Can I use this for 300black out Expert Answer

Yes, these parts can be used on a .300 Blackout because the .300 Blackout is built on a standard AR-15 upper and lower receiver.

by Armando R., Gear Expert, March 1, 2020
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
One Stop Shop Lower Kit by Michael Fegan, December 6, 2017
The "Kit" comes with everything but the Fire Control(Trigger) and was just what I wanted. The red accents were a great complement to the added red lettering to my Integrity lower. One issue was that the stainless steel detent pins for the Take-down...
Read More...
1/2 found this helpful
Helpful Positive Review
Armaspec Lower Parts Kit by Donnie, July 17, 2017
I recommend this kit, it's awesome. Fit and finish of the parts are great. The anti-walk triggers pins are a nice bonus. The front and rear takedown pins provide a nice and tight fit. The mag release button is a little deeper than a milspec mag relea...
Read More...
4/4 found this helpful
Helpful Positive Review
Good fit and finish by MS, Verified Owner, August 30, 2018
Very good product. Everything fits perfect on my ar15 lower build, the finish is nice. The safety 45 degree option is a plus. The stainless steel buffer tube detent is a plus. Will buy another for my next lower.
1/1 found this helpful
Helpful Positive Review
Good value for what’s included by Roguetrader09, Verified Owner, May 14, 2018
Solid LPK. Everything fit in my Aero Precision lower with no issues. When you consider it comes with a short throw (45 degree) safety and anti walk trigger pins, it’s really a pretty good value. Only issues is this version does not come with a grip s...
Read More...
1/1 found this helpful
Helpful Positive Review
good price, decent fit by oddfire, Verified Owner, January 13, 2018
Happy with this kit, for the price of most ambi safety setups you get a whole lower parts kit minus grip and fcg. The downside though is the pivot and takedown pins are extremely tight. I sanded the end of the detents so they would be round and slide...
Read More...
1/1 found this helpful
Helpful Negative Review
Does the Job, but Not Great by Euseph, Verified Owner, April 29, 2020
Here's the deal. The bolt catch, mag catch, and anti-walk pins are all good. No problems with them... The problems I do have are with the takedown pins, and the ambi safety. First the takedown pins... They are complete trash. Both were extremely stif...
Read More...
1/1 found this helpful
Read All 20 Reviews
Color:
Stainless/Black
Caliber:
5.56x45mm NATO
Gun Make:
AR Platform
Gun Model:
AR-15

Code: AMS-LPK-ASGBSL-ARM151-BLK

MPN: ARM151-BLK

UPC: 810048491377

List: $74.99Save $5.00
$69.99

made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Armaspec .223/5.56mm Gun Builders Lower Parts Kit

If you need a lower parts kit for your AR-15 type rifle, the Armaspec Gun Builders Stainless LPK Kit for .223/5.56 is a premium option. These AR15 Lower Parts constructed by Armaspec come with anti-walk pins that preserve the quality of your rifle by keeping the pins from damaging the lower receiver. All included pieces in the Armaspec Tactical Advantage AR Lower Parts Kit are crafted out of stainless steel to ensure they are durable enough to match the strength of the rest of your rifle. The Armaspec Partial Lower Parts Kit for .223/5.56 contains high quality gun parts to complete your lower receiver or to replace damaged or lost parts. Please note that this is not a complete lower parts part kit. Rather, it is a builder's kit. This kit does not include a pistol grip, pistol grip screw and washer, trigger and hammer, trigger and hammer springs, disconnect, disconnect spring, trigger guard and roll pin.image

WARNING: California`s Proposition 65

Specifications for Armaspec .223/5.56mm Gun Builders Lower Parts Kit:

Manufacturer: Armaspec
Color: Stainless/Black
Caliber: 5.56x45mm NATO
Gun Make: AR Platform
Gun Model: AR-15
Last Chance: Yes
Country of Origin: USA

Features of Armaspec .223/5.56mm Gun Builders Lower Parts Kit

  • Includes Armaspec Enhanced Lower Parts
  • Compatible with most AR-15 lowers
  • Lifetime Warranty

Package Contents:

  • Armaspec .223/5.56mm Gun Builders Lower Parts Kit

Armaspec .223/5.56mm Gun Builders Lower Parts Kit Orderable Models

List of Orderable Models

  • Armaspec .223/5.56mm Gun Builders Lower Parts Kit, SS/Black, ARM151-BLK , MPN: ARM151-BLK , UPC: 810048491377 , Code: AMS-LPK-ASGBSL-ARM151-BLK

Armaspec .223/5.56mm Gun Builders Lower Parts Kit Unavailable & Discontinued Models

List of Unorderable Models

  • Armaspec Gun Builders Stainless LPK Kit For .223/5.56, SS/Gold, ARM151-GLD , MPN: ARM151-GLD , Code: AMS-LPK-ASGBSL-ARM151-GLD
  • Armaspec Gun Builders Stainless LPK Kit For .223/5.56, SS/Purple, ARM151-PRL , MPN: ARM151-PRL , Code: AMS-LPK-ASGBSL-ARM151-PRL
  • Armaspec Gun Builders Stainless LPK Kit For .223/5.56, Ss/Red, ARM151-RED , MPN: ARM151-RED , Code: AMS-LPK-ASGBSL-ARM151-RED
  • Armaspec Gun Builders Stainless LPK Kit For .223/5.56, SS/Silver, ARM151-AG , MPN: ARM151-AG , Code: AMS-LPK-ASGBSL-ARM151-AG
  • Armaspec Gun Builders Stainless LPK Kit For .223/5.56, SS/ODGreen, ARM151-ODG , MPN: ARM151-ODG , Code: AMS-LPK-ASGBSL-ARM151-ODG
  • Armaspec Gun Builders Stainless LPK Kit For .223/5.56, SS/Blue, ARM151-BLUE , MPN: ARM151-BLUE , Code: AMS-LPK-ASGBSL-ARM151-BLUE
  • Armaspec Gun Builders Stainless LPK Kit For .223/5.56, SS/FDE, ARM151-FDE , MPN: ARM151-FDE , Code: AMS-LPK-ASGBSL-ARM151-FDE
Compare (0)
1 item has been added
Add at least two items to compare
Last updated 2026-06-20 UTC.