Colt LE901-16S

Called the LE901-16S Modular Carbine, Colt's new 7.62x51 mm NATO is an "out-of-the-box" concept that's a marriage of the AR-10 and AR-15 platforms. An adaptive rifle that uses a highly modified and upgraded AR-15 lower receiver with an equally unique AR-10 magazine well, the LE901-16S quickly converts to an M4-type carbine in 5.56x45 mm NATO.

Conversions for the AR platform aren't a new innovation, but Colt's LE901-16S is a unique adaptation. It's an "out-of-the-box" design that's an ideal addition to the Gun of the Week series.

Technical Specifications:

COLT LE901-16S
Mechanism Type:
direct-gas-transfer-operated, semi-automatic center-fire rifle
7.62x51 mm NATO (.308 Win.)
forged 7075-T6 aluminum
Barrel Length:
16.1" chrome-lined
six-groove, 1:12" RH twist
9 lbs., 8 ozs.
Overall Length:
27 1⁄2" (stock extended), 34 1⁄4" (collapsed)
20-round-capacity detachable box
single-stage; 7-lb., 9-oz. pull
Suggested Retail Price:

Mechanism Type:
direct-gas-transfer-operated, semi-automatic center-fire rifle
5.56x45 mm NATO (.223 Rem.)
forged 7075-T6 aluminum
Barrel Length:
16.1" chrome-lined
six-groove, 1:7" RH twist
7 lbs., 5 ozs.
Overall Length:
27 1⁄2" (stock extended), 34 1⁄4" (collapsed)
30-round-capacity detachable box; accepts AR-15 magazines
accepts AR-15 .223 Rem. upper components for conversion with magazine well adapter, buffer and recoil spring, plastic storage case, cable lock, owner’s manual, magazine
Suggested Retail Price:

For Further Reading:

Quick-Change Solution: Colt's LE901-16S


Share |



Enter your comments below, they will appear within 24 hours

Your Name

Your Email

Your Comment

15 Responses to Colt LE901-16S

Gib wrote:
November 26, 2013

I got one and it is soooo heavy. Instead of buying the conversion kit I went out and bought a good Smith & Wesson.

roger wrote:
May 24, 2013

So ur saying? Don't buy one

Daniel Sampsel wrote:
May 02, 2013

Purchased the 901 in Oct, 2012. I anticipated waiting 1-2 months for production to ramp up and acquire the adapter block. Wrong. Colt is saying on the LE901 web page that LE901's purchased after 1 April, 2013 will have the component included. When are Colt's loyal early adopter's accommodated?

Alfredo wrote:
February 21, 2013

I feel duped as well. And I own two!!!

Dave wrote:
February 09, 2013

Contacted Colt. They claim the conversion kit is not in production yet. They also mentioned not to buy an upper yet since the kit might come with the upper. I feel like we have been mislead. I figured the kit would come with the rifle. Anyone else have any luck?

Tom Wilkins wrote:
January 07, 2013

I also own one....#1903... And have also been attempting to purchase the conversion, unsuccessfully. I'm extremely pleased with the 901. Dead on at 100 yards, right out of the box! Nice fit and finish too.

D. Serrano wrote:
December 16, 2012

I have one as well. Perhaps if Colt can't release these someone can manufacture their own adaptor plate. This shouldn't be that hard. We already know what it looks like and I'm sure getting the measurements right would be fairly easy. All you need to do then is find a decent sheet metal guy or local machine shop. Maybe it's already being done...

Ben Bural wrote:
December 10, 2012

I have the same issue as Mr MacKenzie. I paid what I consider a high end price expecting to get the conversion kit with the rile. The advertising doesn't really say that but sort of implies it to buy stating 'accommodates any mil-spec upper'. Now I'm wondering if the kit mentioned in AR really exists at all. Nobody can find a 6920CK listed anywhere. I'm going to try the letter approach too but I'd really like some help from folks like AR who reviewed the gun and sort of 'sold' it for Colt to help us out by getting an update on when a conversion kit will really be available. Maybe someone from Colt will actually talk to them?

Joe Gallagher wrote:
November 29, 2012

Regarding the comment from Scott MacKenzie, it may be helpful to send a brief letter to the President and CEO of Colt Defense LLC, Colt's parent company (Colt has a number of subsidiaries). The letter can be addressed to: Mr. Gerald R. Dinkel, President and CEO, Defense LLC, 547 New Park Avenue, West Hartford, CT 06110 -- Scott, hope this helps :-)

Charles Ross wrote:
November 28, 2012

Progress: good cartridge, but they still have the direct gas system into bolt which is major cause of M 16 failure; Like all M-16 series; buy two; one might still work.Too bad no one goes after Colt for the military deaths caused by their defective product.

A. Thomas Carlson wrote:
November 27, 2012

There are pros and cons between direct impingment and gas piston design, but to call DI guns "crappy" and DI AR-15s a "marginal design at best" sounds kind of narrow-minded and fanboy-ish to me. Seems to me if they were that horrible, they would not be the de-facto gun in the US and many other militaries.

Some guy wrote:
November 26, 2012

1. Your going to pay ruffly $2k for a AR .308 off the shelf. 2. Your paying $600 for the .223 kit 3. that's two guns at the price of buy one get half off the other.

Chris wrote:
November 26, 2012

Now if you could make it in a gas piston version instead of the crappy "direct impingement" design that makes the original AR into a marginal design at best.

Mac wrote:
November 26, 2012

300 AAC Blackout. Go from 7.62 to 5.56 with just a barrel swap. Same lower and magazines. Just the barrel swap. Any time they use the word "unique" you should hear a cash register and see $ signs.

Scott MacKenzie wrote:
November 26, 2012

I have one (#1766), I love it, it's a tack driver. Unfortunately, it's always discussed in the various reviews with a 5.56 upper and adapter for the conversion. It DOES NOT come with the adapter (or buffer spring), and there's apparently no "kit" available, and no projected time when it will be available. I've emailed Colt several times, posted on their Facebook page ... can't get a human on the phone when I call ... it's very frustrating. SO, please, talk to Colt and find out when the conversion kit will be available, and how much will it cost; you'd be doing E901 owners a great favor since Colt apparently doesn't like to talk to their fans and consumers.