![Colt M4 Commando 5.56mm Semi-Auto Lower Receiver Assembly Colt M4 Commando 5.56mm Semi-Auto Lower Receiver Assembly](https://cdn11.bigcommerce.com/s-6faujhppx4/images/stencil/300x300/products/1337/2599/signal-2024-01-08-103914_003__76382.1704749181.jpg?c=1)
ALL Semi-Auto Colt Rifle Receivers will be marked "Carbine" as of Q4 2020
Factory Colt complete lower receiver assembly to build your AR15, M16 or MK12. Compatible with all mil-spec AR15/M4/M16 upper receivers. Manufactured to truly meet and exceed all Mil Spec standards.
This item is a serialized part, considered a firearm and requires transfer through a FFL
Reviews
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Hassle-Free Service
I was a bit concerned that AU might have a problem working with my local FFL dealer - but nope. No problems whatsoever. That was very welcomed. Plus, the product is exactly as advertised. The entire affair was hassle-free, and I appreciate that service.
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Colt AR15a4 Lower
Lower was as described and super fast shipping
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COLT AR15A4
Colt quality lower to build upon, AU offering a great deal, as well as having excellent customer service on a question, would buy from here again and recommend.