The ARMS 41 is a clamp on flip up sight for the AR15.  It is available with and without a bayonet lug.

Installation is easy.  ARMS also includes a spacer in case you are not using a standard handguard.  When up, the 41 has the same profile as an standard fixed front sight base.  To fold it down, you push down on the angled support next to the front sight post.  It uses standard AR15/M16 front sight posts, so you can insert a match or night sight.

The finish is a light grey.  While I have read reports online of people having the finish wear off quickly, I had no such issues with mine.  While there are reasons why ARMS is not popular, the ARMS 41 is a solid product.


Everyone knows Colt.  Colt started a little over 175 years ago and is now one of our country’s oldest gun makers. In the 1960s, Colt secured the rights to the Stoner/Armalite AR15 and AR10.  Back in ’09 Colt introduced the LE6940 to the market as the first major change to the family since the intro to the wildy successful and popular M4 carbine we see everywhere today.  The 6940 had a lot of parts in common with the M4 (known as the 6920 in semi-auto dress). The major difference was the new upper.  The  6940 upper is monolithic and free floats the barrel.  The receiver and the rail of the ’40 are all machined from a one-piece forging and offers the ability to set optics anywhere on the rail and have total stability.  This helps to keeps your zero, well, zeroed.  Another addition was the folding front sight that replaced the fixed military legacy front sight base that dates back to the originals.

Right or wrong, a desire for more power than the 5.56 arose over the last decade because of the GWOT and because our soldiers are sometimes involved in long range contacts.  The tired old M14 was pressed into service in hopes of extending the range of SDMs and to give a little more confidence to those who felt the 5.56 was not quite enough.  In the years since, a lot of companies have started to ramp up and offer their own versions of the AR-series in 30 caliber and anything else they can squeeze into the magazine well of the rifle pattern.  The Armalite AR10 has been around for a while, the KAC was adopted as a sniper weapon by both the US Army and the USMC, and the LMT MWS has seen limited success as a DM rifle for the British military.

It is in the midst of this 30 caliber revolution that people noticed one name oddly absent from the 7.62 AR market game–Colt.  The company had not forgotten or ignored the trend, but it had to make sure to fill contracts worth millions for the US Gov, including the M4 and recent awards for M240 machine guns.  Now that the war seems to be winding down and Colt has more breathing room, they’re expanding and are stating to fire up their impressive R&D again.  Remember that this is a company that has brought out some of the most legendary firearms of the past 175 years.  After the release of the 6940, rumors started about a version chambered in 308 all over the internet with some links to patents to support the rumors.  Then over a year ago at the SHOT show we saw the 901 for the first time. It was shown in several different barrel lengths and finishes.  Now over a year later the 901 is ready to  hit the market.

What makes the Colt LE901 special is not only is it a 308 rifle, but it can be very easily converted to take any milspec 5.56 upper available and made to quality. Colt considers this their “Modular carbine” and it most certainly is.

With a adapter block (which is installed very easily), the modular ambi lower will take any upper you can find.  One extra part and a swap of the buffer spring and buffer give you unlimited combos with the 901.   The rifle takes the SR25 pattern magazines so it will take the Pmag, (and therefore the KAC and LaRue mags as well).  The barrel is 16 inches long and the button-rifled barrel and chamber are chrome-lined.  As with all Colts, the barrel is MPC and proofed–not just in batches, but every single one of them.  The twist rate of the gun is 1/12 which gives you a pretty wide range of bullet weights to use.

Like the 6940 the  901 has a monolithic upper.  It also has a few upgrades the 6940 does not have. The rail of the 901 has QD sockets not just in the front of the rail, but also in the rear of the rail.  Most people want this and it is great to see this added to the rifle. The front sight is like the 6940’s in that it folds, but the difference is that the 901’s front folding sight is not lockable in the up position for those who worry it might fold down in harsh use right when you do not want it to.

As written above, the lower of the rifle is also ambi.  This is another trend that has started in the last decade and one that will be sticking with us in my opinion. The controls are well placed and easy to use.  None of them are stiff or require so much force as to make them useless.  The gun comes standard with a Colt marked troy BUIS.

A nice feature in the lower is the absence of a web blocking the installation of a RDIAS. So if you have one, full auto fire in a colt 308 can be a reality. The FCG parts are all standard Milspec with all the typical colt quality and testing that goes with that. The 308 marked buffer in the gun can be seen in the picture above.

The 16 inch barrel is described by colt as a HBAR but I would call it more of a medium heavy with a straight taper unlike the taper of older colt HBAR carbines of the past. The rail comes off like the 6940 by depressing the lock on the bottom rear with a round or punch. The rifle sent to me by colt defense also needs a screw on each side of the rail taken out for further stripping.  This helps keep the rail from moving at all for  reliability when using IR lasers or other force multipliers.

The bolt carrier group comes apart just like any other AR but with a few slight upgrades. The firing pin has the addition of a firing pin spring that colt advises not to remove.  The gas rings on the bolt are also one-piece instead of three rings like the 5.56 bolt.

The rest of the BCG is  no surprise. It is made to the same standards as any colt rifle meant for hard combat use with everything tested to milspec and Colt’s TDP that has served millions of military, LEO and civilian personnel for years.

The conversion kit that lets you use the 5.56 upper of your choice comes in three parts. The adapter magazine well block, the 556 buffer spring and the standard Milspec  M4  “H” buffer.  It takes less than a minute to convert the rifle over to 556 and having it operate just like your favorite 556 slayer.  Some people are already saying to use the 308 buffer for a softer shooting carbine but this is a bad idea and I will go out on a limb and say if something goes wrong with your rifle in this configuration of 556 with 30 buffer parts, Colt may not warranty it.  That is PURE SPECULATION on my part, but we all know how companies view such things.

The 901 receiver extension or “buffer tube” as it is commonly called, is standard M4 all the way with the normal colt 4 position. In the picture above is the 308 buffer inside its spring on the left with the 556 buffer to the far right. The 5.56 spring is far left next to the block.

The upper can be tilted down for removal of the BCG and cleaning without taking the entire gun apart. If you’re in a hurry, it’s the way to go although it’s easy to remove the upper completely with the block still on the upper.  The pin is captured so there is no fear of losing it.

Picture shows 556 upper opened as far as it will go with block installed and attached to the lower.

A few people have voiced concerns over what mags the lower with adapter block may or may not take. I found every mag tested will work, including uncommon mags.

Above is a pre-ban colt upper in 7.62×39 with a  ’39 mag in the well. The gun runs flawlessly with the commie caliber upper and magazine fit.

Here is a 6940 upper with the surefire 60 round magazine showing off its stuff and working perfectly.

The world standard 6920 ( M4) upper and the beloved 5.56 Pmag in the 901 lower and working 100 percent.

Finally the Colt  HBAR ELITE  CR6724 24 inch barreled precision upper takes a turn on the lower. All uppers ran as expected with no trouble.

In part two I will write about shooting the 901, its recoil, accuracy and how it does out to 1000 yards along with pictures of targets in testing.

Range Report

A Keltec PMR-30 with somewhere between 5000-7000 rounds through it with out cleaning was found to have a broken slide retaining pin.  The owner found the headed side of the pin walking out when firing.  The other half of the pin remained captive and the pistol functioned perfectly otherwise.  I would write this up as a fluke, just a bad pin.  I am going to follow up with the owner and see how Keltec treats him and handles this broken part.

While you might not need to clean your firearms, you should at least be checking any serious use firearm regularly for abnormal wear, cracks, and damage.

One shooter had the new XS offset sights.  I found them to be far too low and unusable for me.  The owner of them initially indicated his displeasure of how long he had to wait to get them, and then at their layout.  Later in the day he stated that by using a modified sight picture, he was able to use them to his satisfaction.  Despite his change of heart, I feel that they are way to low, unusable, and I recommend against them.

I find the Thorntail offset Scout light mount to be ideal.  I highly recommend this product and will be buying another for my self.


Shawn and I are starting a Q&A section to  Do you have a firearms related question, if so send it to  Once a week Shawn and I will put up a post listing questions, and giving the answers.  We will not post who asked the question, so you will remain anonymous.

However, We will not answer every question.  Please do not ask us to identify and/or appraise your firearms.

4Th of July Sales on the Web

Right now if you go to  and use the promo code 1776  on their cart ppage you can get$ 17.76 off orders over 100 bucks.

Its a great company with great customer service. Check them out and see if they got something you need ( want).

Stay here for  updates for  holiday discounts.


Truprep is having a sale this holiday  as well. Some nice stuff and good deal.

The Colt LE901 A Look at the Parts

I got a few pictures of the BCG  stripped to show the differences in the parts and the size compared to a 5.56 and other  308 pattern rifles.

The BCG stripped for cleaning. The firing pin retaining pin slot has a very nice recessed slot to protect it.

Firing pin and firing pin spring. Colt says DO NOT remove firing pin spring from the firing pin.

901 bolt with firing pin.   You can not tell from this picture but the gas ring on the bolt is one piece.

Front view of the bolt face. Notice how thick and strong the lugs are. This is a heavy duty  part and shouts QUALITY.  Just like all Colt rifles, the bolt is MP inspected, proof fired and hardened. Not in batches, but every one.

The inside of the carrier still looks clean even after 500 rounds fired with no cleaning or lube.

Massive cam pin.

Here is the charging handle. Notice the ridge, or lip on the bottom rear.

A look up into the upper receiver. If you look close you can see the part added for piston conversion on later models.

Check back for more testing of the 901’s accuracy out to 1000 yards coming up.

Comment from Catherine Kim

Catherine Kim submitted this:

Growing up in a beach city in Southern California, firearms were not a common household item. In school I was taught the NRA was “bad.” I had not seen or touched a gun until my mid-twenties. Because of the media, I associated guns with violence. Why do we need guns? Won’t the police protect me? Aren’t guns for criminals? In an idealistic world of course I want to believe there are no needs for weapons, but as my family members and I were put through dangerous situations I became realistic. I have to be my own protector.

We reach an age where we want to try different things and venture out. I’m a strong believer you can’t be judgmental unless you truly try to understand from both sides of the view. So after celebrating New Years in Las Vegas, I decided to go to the gun range. My first firearm was a M249 SAW… a machine gun. My heart was pumping with anxiety. I had never heard a gunshot before. It was loud and the room was cold. Will I do this right? Will I hurt others or myself? I quickly learned it wasn’t that bad at all. Actually it was exhilarating and fun. From that moment the inner firearm fanatic grew. I’ve learned there’s a whole other world to shooting whether for target practice or hunting. It’s not just for the “bad” people. It’s opened an exciting realm full of adventure.

Today, I have several firearms and although I have expanded my knowledge, I am still constantly learning something new. I love shooting guns and my bow. Sometimes you just need to conquer your fears and then you will realize that it’s not bad at all. You only fear what you don’t know. I encourage my friends (especially females) to try it. Go to the range with someone that is knowledgeable and have a good time. I think what most people will realize is it’s a lot of fun and with the proper training you can make it into a hobby you truly love. Now, I am the protector of my house and a proud member of NRA.