Sale
The factory Colt 901 magazine adapter block conversion kit allows you to install any mil-spec AR15/M4 upper receiver and use mil-spec AR15/M4 magazines with your Colt 901 lower receiver. Includes magazine adapter block, buffer and spring.
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Sale
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Out of Stock
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Sale
Reviews
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Works just like it should
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MARC 901 conversion
Great product. Fits AR-15 uppers onto the AR-10 lower. Looking forward to firing it for the first time soon.
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5 star
Great prices and fast delivery.
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Fast service at a fair price
I received my ordered Colt 5.56 adapter conversion kit faster than expected. The unit fit perfectly in my MARC901.
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Works great
I got the kit for my Modular Carbine lower and used it with an LMT MRP 5.56 upper and a Colt LE6920 5.57 upper with no issues. Works as advertised. I knocked a star off since I was expecting the retail card backed version of the product, and instead received the item in a zip lock bag. Not a big deal since I was planning to use the kit immediately, but it would have been nice to know if it was retail or OEM up front.
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Colt LE901 Conversion Block for 5.56/223
This conversion block really rounds out the usefulness of this rifle. It not only allows me to use this heavy built lower with the 5.56 round, but also with my 50 cal Beowulf upper.
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Colt LE901 Parts
I ordered the Adapter Kit for my Colt LE901 and received it very quickly and at a great price.
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Great product !!
Product was a perfect fit.
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Quality products and quick turnaround
Easy online and quick delivery. Excellent inventory of quality Colt parts. Difficult part to find elsewhere was available at Arms Unlimited.