Armaspec AR-15 Superlight Gun Builders Kit - ARM251
or 4 interest-free payments of $18.00 with
6 Magazines Per Order: Due to extreme volume, we are limiting sales of magazines to 6 per customer order. This applies to individual and bundled magazines. AT3 reserves the right to cancel any order over the 6 magazine limit.
- Free standard shipping on orders $139+ details
- 90-day no-hassle returns policy
- Backed by the Armaspec Lifetime Warranty! what it covers
Frequently bought together
From orders that included this itemProduct description
Lightweight AR-15 LPK with Anti-Rotation Pins
The Armaspec AR-15 Superlight Gun Builders Kit was developed to further customize and improve the performance of your AR-15 build. It utilizes and provides some of the most reliable materials that will provide you with numerous years of well-performing and effective parts you have been on the lookout for.
The Armaspec Superlight Gun Builders Kit is among the products of the top-notch AR15 Lower Parts to prolong the efficiency of your rifle and serves as a good replacement or upgrade if your current lower receiver parts have come to fail or weakens.
These high-quality components and precise manufacturing parts from Armaspec is ideal for maintaining and upgrading your firearms. The durability, reliability, and excellent build quality of these parts will ensure years of service you can count on.
Features:
Inclusions:
- 1x Armaspec SFT 45/90 Safety Selector
- 1x Bolt Catch
- 1x Enhanced Superlight Takedown and Pivot Pins
- 1x Stainless Steel Takedown detent
- 1x Takedown Detent Spring
- 1x Stainless Steel Pivot Detent
- 1x Pivot Detent Spring
- 1x Stainless Steel Anti-Walk Trigger/Hammer Pins
- 1x Stainless Steel Buffer Retainer
- 1x Magazine Catch
- 1x Magazine Spring
- 1x Enhanced Magazine Release Button
- 1x Stainless Steel Bolt Catch Detent
- 1x Stainless Steel Safety Selector Detent
- 1x Bolt Catch Roll Pin
- 1x Bolt Catch Spring
- 1x Buffer Retainer Spring
- 1x Selector Detent Spring
- 1x Hex Keys for Anti-Walk Pins
Note: This is “NOT” a complete lower parts kit. This is a builder’s kit. This Kit does not include the Pistol Grip, Pistol Grip Screw and Washer, Trigger and Hammer, Trigger and Hammer Springs, Disconnect, Disconnect Spring, Trigger Guard, and Roll Pin.
All 5 options on this page
- Armaspec AR-15 Superlight Gun Builders Kit - ARM251 - Color: FDE | SKU: ARM251-FDE
- Armaspec AR-15 Superlight Gun Builders Kit - ARM251 - Color: OD Green | SKU: ARM251-ODG
- Armaspec AR-15 Superlight Gun Builders Kit - ARM251 - Color: Blue | SKU: ARM251-BLUE
- Armaspec AR-15 Superlight Gun Builders Kit - ARM251 - Color: Black | SKU: ARM251-BLK
- Armaspec AR-15 Superlight Gun Builders Kit - ARM251 - Color: Red | SKU: ARM251-RED
Customer reviews 5
1. The takedown pin was extremely tight in my Mega Arms lower. I believe this is due to the heavy color coating on the pin. After rotating the pin about fifty times it became functional.
2. The detent for the takedown pin would not engage when closed and was easy to disengage. I used as small drill bit to open up the top portion of the detent hole, now it engages the detent securely.
3. The trigger guard has sharp corners at the roll pin end which sticks out about 1/32". I radiused the corners to make it smooth, but that removed a bit of the finish.
4. Kit was missing the Torx wrench for the safety selector. Not a hug deal, I have spares.
5. The kit has no labels or diagram for the parts which are organized in the clamshell in an illogical way. If you're a first-time builder, you'll need to research where each part goes.
6. I haven't gotten to installing the safety/selector yet and will report on its fitment and function later.
AT3 Tactical · Thanks for the review! We're glad to hear that you're happy with the quality and price of the kit.
AT3 Tactical · Thanks for sharing your feedback! We're glad you're satisfied with your purchase.
AT3 Tactical · Thanks for sharing your feedback! We're glad you're satisfied with your purchase.
Questions & Answers
No questions yet. Ask about fit, install or compatibility and our team answers within a business day.
Warranty & returns
Backed by the Armaspec Lifetime Warranty!
Armaspec Lifetime Warranty
- All Armaspec products carry a LIFETIME WARRANTY and are warranted to be free from defects in material or workmanship.
- Should there be a defect, we will repair or replace the product at our discretion at no cost to you.
- Lifetime warranty does not apply to products sold as “blemished” or “manufacturer refurbished”.
- You must have proof of purchase to initiate a WARRANTY claim.
Please email to rma@armaspec.com to request an RMA number.
Disclaimer: Manufacturer’s warranty is subject to change without prior notice.
90-day no-hassle returns
The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.
If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

















