Su­per Duty LE



When will Geissele build and re­lease a com­plete weapon sys­tem? The an­swer to that ques­tion is — now.

Ire­cently re­turned from North Wales, Penn­syl­va­nia, where I was for­tu­nate enough to have spent the day with the team at Geissele Au­to­mat­ics.

The day con­sisted of run­ning around the shop, talk­ing about gear and prod­ucts, and, of course, dis­cussing a new item that peo­ple have been wait­ing to see Geissele Au­to­mat­ics pro­duce. While in the shop, I was able to put my hands on a new car­bine that is pro­duced and will be sold by Geissele Au­to­mat­ics. This new car­bine, given the name Su­per Duty, is sim­ply an amaz­ing weapon sys­tem.


Spend­ing time with Bill Geissele and his team at Geissele Au­to­mat­ics is al­ways a high point of a trip back to the eastern part of the United States. This trip was filled with a lit­tle more an­tic­i­pa­tion, as I had been given the heads-up that I would be one of the first to see and shoot their newly built car­bine.

Hav­ing the op­por­tu­nity to sit down with Bill and Diego Muya and talk in-depth about this project was noth­ing short of amaz­ing. I was able to gain in­sight into this weapon sys­tem, and I was also able to un­der­stand all of the thoughts and pro­cesses that went into this soon-to-be-on­the-mar­ket car­bine. To say I am im­pressed is an ab­so­lute un­der­state­ment.

Shortly af­ter ar­riv­ing at the Geissele Au­to­mat­ics shop I was taken into their assem­bly room. It was here that I was able to get my hands on two dif­fer­ent Su­per Duty weapon sys­tems. One in semi-au­to­matic will be sold as the

Su­per Duty LE and the other, Su­per Duty, is a se­lect-fire weapon and will be mar­keted more to­ward other cus­tomers who will need the fully au­to­matic ca­pa­bil­i­ties. Both are very sim­i­lar, func­tion flaw­lessly and de­liver ab­so­lute re­li­a­bil­ity round af­ter round.

Dur­ing the con­ver­sa­tion, Bill walked me through the Su­per Duty weapons, but we mostly fo­cused on the Su­per Duty LE ver­sion. From the busi­ness end all the way back to the butt­stock, Bill went through each and ev­ery com­po­nent, get­ting down to types of ma­te­ri­als used for ev­ery item on the weapon. This is some­thing that in­trigues me be­cause I can find out why cer­tain ma­te­ri­als were used over other ma­te­ri­als.

Com­ing from an en­gi­neer­ing back­ground, Bill ex­plained the ma­te­ri­als and parts with his en­cy­clo­pe­dic knowl­edge of weapons and what makes them func­tion like a sewing ma­chine. I truly could sit for days on end and lis­ten to Bill talk about weapons of all kinds. But to­day, we were pri­mar­ily fo­cused on the Su­per Duty line of weapons. Now, we’ll run you through it.


At the muz­zle end of the Su­per Duty LE, it starts off with the stan­dard A2 flash hider that sits at the end of Geissele’s own chrome-lined, chrome-moly vana­dium bar­rel. This is not a stan­dard pro­file bar­rel; rather Geissele calls it their medium-pro­file bar­rel. When you look at it, you’ll see that there is a con­stant ta­per on this bar­rel that leads to the gas block. Bill ex­plained that this type of bar­rel is lighter than a stan­dard M4 pro­file bar­rel, and it is op­ti­mized with weight ver­sus stiff­ness.

Bill also ex­plained that man­u­fac­tur­ing a bar­rel with a straight ta­per of­fers the weight re­duc­tion with­out hav­ing to flute the bar­rel. While talk­ing about flut­ing, Bill also spoke about how some mil­i­tary ar­mor­ers con­sider a non-fluted to be more ac­cu­rate than a fluted bar­rel. I def­i­nitely felt the weight of this medium-pro­file bar­rel

when han­dling and shoot­ing this weapon.

Work­ing our way back down the bar­rel, the Su­per Duty LE comes with their ni­trided Su­per Gas Block that is set pretty much in stone. It is both pinned and dim­pled, which of­fers a triple method of se­cur­ing the gas block to the bar­rel.

The gas block sits over a gas port that is con­sid­ered in­ter­me­di­ate in length. This in­ter­me­di­ate length gas sys­tem is right be­tween mid-length and ri­fle-length. Ul­ti­mately, the shooter gets a much softer type re­coil im­pulse with this in­ter­me­di­ate length gas sys­tem. In go­ing with the in­ter­me­di­ate length gas sys­tem, Bill stated they could have gone out longer to a ri­fle-length sys­tem, but he said by do­ing that it would not sup­port all types of am­mu­ni­tion.

Bill also talked with me about hav­ing to use this sys­tem in ex­treme tem­per­a­tures. Think about Alaska and some of our north­ern states; they might reach 40 de­grees be­low zero, and that is where Bill wanted to make sure his Su­per Duty LE would run. Bill has worked in the min­ing in­dus­try at these tem­per­a­tures and knows that law en­force­ment needs to be able to op­er­ate and con­duct their jobs with the best pos­si­ble equip­ment avail­able, hence the rea­son for this weapon sys­tem be­ing able to op­er­ate down to -40°. Hav­ing shot this weapon, I can at­test to how flat the Su­per Duty LE shoots, but I will ex­plain more of that later.

Still work­ing with the bar­rel, the Su­per Duty LE has a new style bar­rel ex­ten­sion. This ex­ten­sion has a new ramp an­gle, and it is able to ac­com­mo­date all kinds of dif­fer­ent am­mu­ni­tion, which in­cludes the new M855A1. In high-speed test­ing, they are able to see that the round com­ing off of the mag­a­zine launches into the bar­rel straighter, which aids in the func­tion of the weapon. The bar­rel ex­ten­sion also has a dif­fer­ent cham­ber, which al­lows just about any type of am­mu­ni­tion and bul­let type to be used in this car­bine. This is very in­ter­est­ing, and I am glad to see this, as ev­ery agency seems to use dif­fer­ent am­mu­ni­tion. Be­ing able to go from one am­mu­ni­tion type to an­other is help­ful in the law en­force­ment world.

Cov­er­ing the bar­rel, gas tube and Su­per Gas Block is an ALG De­fense V2 Rail that has been ap­pro­pri­ated from ALG De­fense for the use on this weapon sys­tem. It is 13-¾ inches in length and comes to the end of the gas block. Bill and his team chose this rail, as it is long enough to use over bar­ri­cades, shoot­ing over a hood or from the side of a build­ing — and you can still re­main with cover on your side with max­i­mum sta­bil­ity from this rail.

The V2 rail is ca­pa­ble of ac­cept­ing M-LOK type de­vices, and it is con­fig­ured with the small Pi­catinny rail out front. The Geissele team

“Both are very sim­i­lar, func­tion flaw­lessly and de­liver ab­so­lute re­li­a­bil­ity round af­ter round.”

de­cided to use this rail as it was small and min­i­mal, and they felt that peo­ple us­ing this weapon would likely not be throw­ing all types of dif­fer­ent laser aim­ing de­vices or other items not used in the law en­force­ment world.

Some­thing that re­ally stood out to me are the ma­chined-out ar­eas up front that are coated in blue. This was Bill’s thank you to the law en­force­ment com­mu­nity.

The bar­rel is mated to a well-built up­per that is ma­chined from 7075-T6 alu­minum. It is Type III hard-coat an­odized and will take a beat­ing. The weapon I worked with has the Geissele Su­per Charg­ing Han­dle in­stalled, but the fi­nal ver­sion may be fit­ted with the Air­borne Charg­ing Han­dle. Look­ing into the up­per, the bolt car­rier assem­bly is the Geissele Hy­brid REK (Re­li­a­bil­ity En­hance­ment Kit). The bolt car­rier assem­bly has their fa­mous ex­tended rails that add to the smooth­ness and re­li­a­bil­ity of their weapons. The bolt car­rier is Nanoweapon coated, as is the gas car­rier key. Nanoweapon coat­ing is an ex­tremely long PECVD process used only by Geissele that coats weapon ma­te­ri­als to a point where they are ex­tremely hard and will cut through dirt and foul­ing, which trans­lates into weapons parts that do not get beat up like other ma­te­ri­als that are used in weapons man­u­fac­tur­ing.

The bolt it­self is an M4 car­bine phos­phated bolt that is mated to the bolt car­rier assem­bly. Geissele has fit­ted this bolt with the cur­rent and lat­est mil-spec, cop­per-plated ex­trac­tor spring, but they also added an O-ring over the cop­per spring. This O-ring not only in­creases the force of the ex­trac­tor ten­sion, but it is also ex­tremely re­li­able and will not fail at ex­treme cold tem­per­a­tures. Re­mem­ber, 40° be­low zero.

A cou­ple other parts in the bolt car­rier assem­bly are the stan­dard cam pin, and Geissele is us­ing a fir­ing pin that they be­lieve is ma­chined cor­rectly and falls within the specs of the M4 fam­ily of weapons.

Mov­ing on to the lower, the Su­per Duty LE will be us­ing the Ad­vanced Com­bat Trig­ger, by ALG De­fense. This trig­ger meets mil-spec and it is not lighter by any means, but it brings the trig­ger

weight down to the bot­tom end of trig­ger specs. This is a sin­gle-stage trig­ger that is sim­ply amaz­ing when press­ing and re­set­ting. For law en­force­ment use, this trig­ger will be a per­fect ad­di­tion to this amaz­ing car­bine.

Some­thing new and in­ter­est­ing on the Su­per Duty LE is the Geissele Posi-lock se­lec­tor. What is in­ter­est­ing about this is the pos­i­tive en­gage­ment when com­ing out of safe and onto fire or go­ing back from fire to safe. The Posi-lock se­lec­tor will not al­low the se­lec­tor to re­main in be­tween fire and safe, and the se­lec­tor will be am­bidex­trous with a large lever on the left and a shorter lever on the right side of the lower. What makes the move­ment so pos­i­tive is the steel used for the se­lec­tor de­tent and a high-power de­tent spring. The de­tent is made in-house, out of a spe­cific steel and hard­ened to 60 Rock­well. This de­tent will not gall, chip or be­come softer as you use this se­lec­tor.

Geissele wanted to make sure this weapon left their fac­tory ready to be used. Add a lit­tle bit of lu­bri­ca­tion, some am­mu­ni­tion and head out to the range. That be­ing said, they looked at front and rear sights and de­cided to build these in-house as well. The end-user will have a few dif­fer­ent op­tions when it comes to the sight­ing sys­tem, again all made in-house, but the op­tions will be left up to the buyer. You will be able to choose be­tween a fixed front and rear, fold­ing front and rear or any com­bi­na­tion of fold­ing or fixed sights. These sights are made of air­craft-qual­ity alu­minum and will not be sold or of­fered out­side of com­pleted guns, as they are specif­i­cally for this sys­tem right now.

The rear sight is sim­i­lar to an old A1 sight sys­tem. You must have a tool or the end of a sharp bul­let point to move the aper­ture, but once your zero is set, it will not move. The rear sight is fit­ted with a .072-inch aper­ture that will not re­strict law en­force­ment in low light or be an is­sue with ag­ing eyes. The front sight will be sim­i­lar to an A2 front sight and again, will be avail­able as a fixed front sight or a fold­able front sight.

Com­ing back down to the lower, the Su­per

Duty LE uses the Su­per 42 ac­tion spring and an H1 buf­fer. These two items, when used in con­junc­tion with the Nanoweapon-coated bolt car­rier assem­bly, make for an ex­tremely smooth and straight re­coil. When shoot­ing this weapon, I no­ticed very lit­tle move­ment, both with the weapon com­ing straight back or the muz­zle ris­ing. These parts func­tion ex­tremely well to­gether and give very slight re­coil with the shooter.

The fur­ni­ture used for the Su­per Duty LE will be the stan­dard A2 grip, and it will most likely be fit­ted with a B5 SOPMOD stock. The team at Geissele is still check­ing around with dif­fer­ent law en­force­ment agen­cies through­out the United States to see what the most com­mon car­rier sys­tem is in use to­day. Geissele does not want to send out a stock on a weapon that will not fit in most ve­hi­cle gun mounts. Very thought­ful of Geissele to go to this added length to make sure end users get a gun that is ready to go from the mo­ment it is placed in their hands.

Just han­dling this weapon in the shop, I was be­yond im­pressed. From pick­ing it up and feel­ing the weight, to shoul­der­ing this sys­tem with an op­tic, to just mov­ing into a cou­ple of dif­fer­ent po­si­tions … the Su­per Duty LE fit­ted me per­fectly. To say I could not wait un­til we got to the range was an un­der­state­ment. Within a cou­ple of hours of be­ing in­side the shop at Geissele, we hopped in the truck and drove east to one of the ranges they use for test­ing.


Af­ter about an hour and a half of driv­ing through some beau­ti­fully scenic roads, we ar­rived high atop a moun­tain and set­tled on the Geissele

Ri­fle Range. The com­pletely cov­ered shoot­ing area has tar­gets start­ing at 50 yards and go­ing all the way out to 200. We quickly un­loaded the Su­per Duty and the Su­per Duty LE and started load­ing mag­a­zines with M855 am­mu­ni­tion. Once the mag­a­zines were loaded, we added a lit­tle bit of Geissele Go-juice, quickly ze­roed the weapons and started shoot­ing.

I be­gan with the Su­per Duty LE in my hands, shoot­ing nice groups on steel. I was im­me­di­ately in awe of the re­coil im­pulse and the ex­tremely light re­coil of this car­bine. This was my first time shoot­ing a weapon with an in­ter­me­di­ate-length gas sys­tem, and I was very im­pressed.

Mov­ing on from my orig­i­nal spot at 50 yards, I be­gan shoot­ing all the way out to a man-sized sil­hou­ette at 200 yards, stop­ping at 75 yards, 100 yards and 150 yards. Ev­ery­thing I aimed at on this af­ter­noon was hit. The Ad­vanced Com­bat Trig­ger per­formed flaw­lessly, re­coil was sim­ple and be­yond man­age­able. When I started shoot­ing two, three and four rounds in rapid se­ces­sion and hit­ting at 200 yards re­peat­edly, I was even more im­pressed with the weapon and the gas sys­tem that helped me keep my sights on tar­get.

I was able to heat up the bar­rel on the Geissele Su­per Duty LE quite a bit, but it never fal­tered while in my hands. Stand­ing, kneel­ing and off the bench, the weapon sys­tem just ran and ran. There were no is­sues, and it was a plea­sure to have up against my shoul­der. Af­ter I fed quite a few mag­a­zines through the Su­per Duty LE, I gave it a break to let it cool and to give the oth­ers on the range a chance to shoot this weapon.


Mov­ing to the Su­per Duty (se­lect fire) car­bine, I picked this up and was equally im­pressed with the weapon in my hands. It is 14-½ inches, and the re­coil on the Su­per Duty was only slightly dif­fer­ent than the Su­per Duty LE. With just a lit­tle bit of at­ten­tion to your grip and stance, do­ing a full mag­a­zine dump with the Su­per Duty leaves the muz­zle steady and not ris­ing at all.

The Su­per Duty has all of the qual­i­ties of the Su­per Duty LE, but it can be con­fig­ured a bit dif­fer­ently and built for the end user’s needs. There will be dif­fer­ent bar­rel length op­tions, dif­fer­ent rail op­tions and per­haps a few other items of sig­nif­i­cance that will make the Su­per Duty more amenable to a high-round count user.

This weapon also per­formed flaw­lessly and had me smil­ing from ear to ear af­ter each empty mag­a­zine was ejected from the weapon. Work­ing with the Su­per Duty and feel­ing the er­gonomics of the MK16 rail sys­tem makes the

weapon feel like an ex­ten­sion of your arms and hands.

Ac­cu­racy with the Su­per Duty was just as it was with the Su­per Duty LE. Ev­ery tar­get I sighted in on and did my part with grip, stance and press­ing the trig­ger gave the re­sound­ing thud of a bul­let hit­ting steel. Out to 200 yards was not a prob­lem with the Su­per Duty.

As soon as the red dot of the Aim­point T1 found cen­ter, I pressed the Geissele SSF-X trig­ger and that started the cy­cle of op­er­a­tion that ul­ti­mately ended with the 62-grain bul­let meet­ing hard­ened steel. This weapon sys­tem will be a home run amongst those folks look­ing for an in­cred­i­bly well-built weapon sys­tem that can be had with a lit­tle cus­tomiza­tion.

Af­ter putting nu­mer­ous mag­a­zines worth of am­mu­ni­tion through both weapon sys­tems, our day on the range had to come to a close. We packed ev­ery­thing up and headed back down the moun­tain to­ward the Geissele Au­to­mat­ics shop.


Sit­ting down and talk­ing with Bill and Diego about all types of things weapons re­lated, I was able to hear some­thing in­cred­i­ble about the Su­per Duty LE and Bill’s mind­set about build­ing this weapon. When asked specif­i­cally about the pric­ing and what went into the Su­per Duty LE, Bill said, “What I tried to do is give the po­lice of­fi­cer as much tech­nol­ogy as we give to the U.S. mil­i­tary with our guns at a price point of $750. Our goal is to sup­port the po­lice of­fi­cer.”

This is in­cred­i­ble. What a heart­felt ges­ture to sup­port the “blue fam­ily,” es­pe­cially with their en­gi­neer­ing and in­sight into weapons man­u­fac­tur­ing. The team at Geissele is do­ing what they can to get the best gun at the best price point out there.

As I men­tioned ear­lier in the ar­ti­cle, I could sit and talk with both Bill and Diego for hours and hours about all things weapons re­lated. But at some point, our day had to come to an end, and it did so af­ter I gath­ered up as much in­sight as I could on these two weapons.

Be on the look­out for these weapons to hit soon and to make a mas­sive im­pact with the end users. Geissele Au­to­mat­ics is known for qual­ity, re­li­a­bil­ity and build­ing parts and weapons that are mis­sion spe­cific. These weapons ab­so­lutely fit this nar­ra­tive. An­other amaz­ing job by the Geissele Au­to­mat­ics team.

“I was im­me­di­ately in awe of the re­coil im­pulse and the ex­tremely light re­coil of this car­bine.”

Like the law­man’s six-shooter, a tool of days gone by, the Su­per Duty LE is up to the task.

Af­ter a mag­a­zine change, the in­creased sur­face area of the bolt catch pro­motes ease of func­tion when lock­ing back the bolt or re­leas­ing the bolt.

OP­PO­SITE: The thin-blue line will be a fea­ture on ev­ery Su­per Duty LE car­bine. It sym­bol­izes Geissele’s com­mit­ment to sup­port­ing law en­force­ment of­fi­cers. BE­LOW: The Geissele Posi-lock am­bidex­trous safety se­lec­tor of­fers strong tac­tile feed­back to the op­er­a­tor as it en­gages. There is no doubt you’ve en­gaged fire mode or put your weapon on safe.

The unique pro­to­type se­rial num­ber de­notes many trips to the prov­ing grounds, per­form­ing tasks in all weather.

The author, who works for a Cal­i­for­nia-based law en­force­ment agency, said he got the run­down on each and ev­ery com­po­nent, in­clud­ing the types of ma­te­ri­als used for ev­ery item.

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