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AR-15 Lower Parts Kit
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BBLMSRP Sale $195.00 - $459.90$229.95MSRP $229.9514.5" AK-100 Profile Barrel: Optimized for use with our GBC-13 gas block combo, this 14.5" AK-100 profile barrel is designed for the permanent attachment of 4C-14F-KM,...
Description
**NOT AVAILABLE FOR CA,SHIPPING**
ANY GUEST WHO ATTEMPTS TO PLACE AN ORDER WITH UNAVAILABLE STATE SHIPPING, THE ORDER WILL BE CANCELLED/REFUNDED.
JC logo AR-15 / M4 forged receiver
Machined with extra attention to the small details, this lower receiver has a classic style with perfect fit and finish
Key Features:
- M4 Mil-Spec Lower Receiver
- Set Screw retainer for selector detent/spring
- SAFE - SEMI - AUTO selector markings
- Pocket for DIAS/SOT Conversion
Specifications:
- 7075 Forged Aluminum
- Type 3 Hard Coat Anodized
- Model - M4
- Caliber - Muilti
- Manufacturer - MDi-Co (our machine shop)
Serial numbers JMACX015-JMACX250 may have tight tolerance in trigger well. All standard Semi-Auto FCG should fit. “Drop In” or “cassette” may require fitting. Accommodation for this type of trigger has been made on JMACX251+
This item must ship to an FFL!
Please note: FFL items may take 5-7 days to process.
Details
FFL: |
Yes |
Reviews (11)
11 reviews
Write Review
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5 Stripped “BLEM” lower
Noy on Feb 28th 2026
Lower was packaged well and though it was a blem , which I have yet to find , was well machined and within tol . The lower had no tooling marks and everything fit well def worthy of a Gucci build
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5 Fantastic
Corey Fowler on Apr 15th 2025
Excellent quality forged receiver. Thanks JMAC!
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5 Jmac customs lower receiver
Mikah on Oct 15th 2024
Great product. Great quality. 100% worth the money
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5 Jmac Stripped Lower
David R. on Nov 10th 2023
This lower came with the quality you expect from Jmac. the “Auto” selection isn’t just for show, as the internal is cut to accept the 3rd pin components, should you SOT & drill it.
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5 Feedback
Andrei on Mar 24th 2023
Even 2nd-grade items are of amazing quality
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5 Blem M4 Lower
Ben on Jun 27th 2022
Picked up a blem lower on a whin and was very pleased with the quality. I had to search pretty hard to find anything to qualify the receiver as blem (small dent just above rear of grip location). Fit and finish is excellent
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5 Ar15/M4 forged lower
Patrick Callaway on Dec 8th 2021
This product is high quality, and was machined flawlessly. 10/10 would recommend, and 100% chance I will continue to use JMAC products.
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5 Forged lower receiveR
Corey layman on Dec 4th 2021
Fit and finish are excellent. Very nice anodizing. I would highly recommend this receiver to anyone looking for a forged lower receiver!
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5 JMac m4 lower receivers
Troy on Jun 12th 2021
I have now purchased 3 of the JMac M4 lowers (1 alpha run, and 2 "blems" which were nearly perfect), and they are excellent quality and machining. Very high-quality finish. And they are low-shelf cut with the proper 3-position indicator markings. I will be buying more in the future. Very high-quality product. Highly recommend you give one a try.
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5 AR/M4 lower
Damon Mathews on May 21st 2021
Thanks for another great product!
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5 AR/M4 lower
Damon on May 6th 2021
Awesome quality! Very nice. Great product & great communication. I will definitely be back. Thanks JMAC!