Geissele Automatics Super Duty Rifle - DDC - 16.25"

Manufactured by Geissele Automatics
SKU: 08-188S
MPN: 08-188S
Manufactured by Geissele Automatics
2 Reviews

In Stock

Standard orders will be shipped within the same business day. FFL orders will ship within 2 business days or less as long as we have the information for the transfer destination. Priority shipping methods like Overnight Delivery, Air Delivery, 2nd Day Delivery, or 3 Day delivery do not include Saturday or Sunday as delivery days.

Items that are regulated by the ATF have restrictions and requirements: 
•Your entire order will ship only to a Federal Firearm License holder.
•Current processing time is approximately 14 to 16 days.
•Please contact your local FFL prior to placing your order to ensure they are still accepting transfers. Due to Covid-19 many are no longer open
•A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to



The Geissele Super Duty AR-15 Rifle was designed with the philosophy that high quality doesn’t mean high cost. This 16” rifle chambered in 5.56 NATO is built to the standards that you come to expect from Geissele Automatics with all the popular features that you love. It is built on a Mil-Spec receiver set and assembled with the Geissele Super Duty lower parts kit that includes the ambidextrous Posi-snap safety selector, Super Duty trigger guard, Maritime Extended bolt catch, and the SSA-E Super Semi-Automatic Enhanced trigger. The 16” barrel is precision machined and button rifled in house and features a heavy profile and mid-length gas system. Combined with the Super 42 buffer spring and H2 buffer weight keep this rifle running reliably and shooting flat. Why build a rifle from the ground up when you can grab this one off the shelf with all the parts you were going to use anyway.

  • 16” heavy profile barrel
  • Chambered in 5.56 NATO
  • Manganese Phosphate barrel finish
  • Chrome lined bore
  • Button rifled
  • Mid-Length with Super Compact gas block
  • Super 42 buffer spring and H2 buffer
  • Super Duty LPK with SSA-E trigger
  • 15” SMR MK16 free float M-LOK handguard
  • Closed Tine SureFire War Comp
  • B5 Systems carbine stock
  • Desert Dirt anodized receivers

The Geissele SMR MK16 is a 15” free float handguard with M-LOK attachment slots for quickly adding lights and grips and features an extremely durable barrel nut attachment system that is also easy to remove. Additional features that come with this rifle is the B5 Systems carbine stock, an A2 pistol grip, and a Mil-Spec bolt carrier group.

Geissele Automatics manufactures confidence, offering quality triggers and components for the warfighter and competitor. They were established in 2004 with the mission to build the highest quality, reliable triggers for competition and their first trigger, the Hi-Speed National Match trigger, was so popular that they were asked by the Department of Defense to produce a select-fire trigger for the United States Special Operations. Again, it was a success and Geissele decided to bring a semi-automatic version to the civilian market for law enforcement and personal protection.
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Barrel CoatingManganese Phosphate
Barrel ContourHeavy
Barrel Length16.25
Barrel LiningChrome
BrandGeissele Automatics
Caliber Gauge5.56 NATO
Gas System LengthMid-Length
Gas System TypeDirect Impingement
Handguard15 in Geissele SMR MK16
Muzzle DeviceSureFire Closed Tine Warcomp
Thread Pattern1/2 X 28
Twist Rate1:7

Ratings & Reviews

2 reviews

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Best first AR15 and online firearm purchase experience ever

by -

I've been a long time gun owner, but never got around to an AR15 until now. I'd read the guides and listened to the experts who talk about piecing together your own firearm. Alas, these days, I don't have that time, and was willing to spend a little more to get something I knew would be right out of the box.
<br>And I got what I paid for. The Geissele trigger is as good as advertised, and the paint job is superb (actually an anodized coating from what I understand). It's not really FDE, and is instead more of a bronze. Everything was correct as received. For the price paid, I kind of wish the handguard had come with iron sights and a lower rail, but this is minor.
<br>Primary Arms was fantastic during the purchase process, was quicker than they warned (given the virus and slowing due to shipping)&gt; They had my local FFL dealer on file, and the process was painless to say the least. Now I have a new expensive hobby, and two reputable partners (Geissele and PA).

Reliable and High Quality Carbine

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I wanted a 16" carbine for the increased accuracy at longer distance. When I saw this Geissele Super Duty for sale on Primary Arms, I knew this was the one for me. I've read a lot of positive things about Geissele and their superb quality.
<br>Shooting this carbine is a joy. It runs smooth and reliable. I know I can count on it 100% if I ever have to use it for defensive purposes.
<br>I use the Primary Arms 3x32 CQB ACSS scope and it nails 1 MOA groups at 100 yards with M193 55gr. ammo, which is not the most accurate rounds out there, but will get the job done.
<br>If you're wanting an AR-15, I highly recommend this. It is well worth the money spent!