Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
Questions & Answers
are these blemished?

No, they are not blend.

by Terry Womack, Verified Owner, May 11, 2025
On the 16-inch MOD1, is the flash hider pin and welded?

No, the barrel is threaded

by Terry Womack, Verified Owner, May 11, 2025
Customer Reviews
Helpful Positive Review
It’s such a beautiful upper and amazing color and just amazing looks came in the mail super quick and zero damages! Thanks Optics Planet!
1/1 found this helpful
Helpful Negative Review
super duty mod1 upper only by iceman, Verified Owner, October 6, 2024
Unfortunately i only received the upper with no bcg or charging handle. I did went ahead and used my bcm bcg with radian raptor charging handle on a aero precision m4e1 lower and so far i liked how the geissele super duty mod1 performed!
7/11 found this helpful
Most Recent Reviews
Great barrel by Desertshooting4funZ, September 17, 2025
Shipping was great experience with ups and optics planet. Barrel arrived clean and well packaged. Was able to take it out and it shot very smooth. No hiccups. Not gassy, everything from the BCG to fitting the upper was smooth. Really can’t complain...
Read More...
Most Recent Reviews
Couldn’t be happier with the quality of this Geissele upper! Optics planet delivered again!
Most Recent Reviews
SUB-MOA Precision Rifle by George Perkins, Verified Owner, December 8, 2024
My third Super Duty upper. Built a dedicated marksman rifle with the 16in and am getting .3-.5 MOA at 100. Geissele is by far the best quality manufacturer for barrels and handguards. Something to be aware of, the URG-I uppers include buffer & buffer...
Read More...
Most Recent Reviews
Excellent piece by Chris S., Verified Owner, December 1, 2024
This is my first “higher end” build. I spent a few months researching what rifle would be best for my needs and budget. I wanted something I could use in 2 gun competitions and shtf situation. Geissele did a great job with this upper. The machining i...
Read More...
Read All 6 Reviews
2 Models Available
Color
All
Weight
All
Gas Block Journal Size-Diameter
All
Search

ATTENTION! We currently do not ship this product to P.O. Boxes, AK, CA, CT, DE, HI, MA, NJ, NY, U.S. Territories, or select Colorado locations. Please see our policies for more information or a detailed list of locations.

Product Info for Geissele Super Duty Mod1 5.56mm, 16 inch Complete Upper

The Geissele Super Duty MOD1 Upper (Complete) features the latest in weapon technology available exclusively from Geissele Automatics. This 16in complete upper chambered in 5.56mm features a nanoweapon-coated HUXWRX Flash Hider-QD muzzle device mounted to an 16in Manganese Phosphate coated, CHF, Chrome Lined 1-7 twist barrel. Our barrels are precision machined and cold hammer forged utilizing the highest quality materials at our state of the art facility in North Wales, PA. The Geissele length gas system and Geissele Super Compact Gas Block with bomb-proof installation ensures reliability and optimal performance in extreme conditions.image

Included is a brand new, 15in Super Modular Rail MK16 that mates to the upper via a center aligning tab removing any chance of rail rotation. This rail is a variant of the 13.5in SMR MK16, currently fielded by USASOC and renowned by operators for their performance and comfort.

Also included is the Geissele Reliability Enhanced Bolt Carrier Group. This Nanoweapon coated BCG features a properly torqued and staked, chrome lined gas key. The Cam Pin is machined from advanced, medical steel known as H13 which is also coated with Nanoweapon for maximum corrosion and wear resistance. The Geissele Reliability Enhanced Bolt Carrier Group also features extended upper rails, providing greater stability and dramatically increasing feeding reliability.

The Geissele Reliability Enhanced Bolt Carrier Group comes with the Geissele Stressproof Bolt. Made from Carpenter 158+, directly developed with Carpenter Steel metallurgists to create a material that is cleaner and has less impurities. This makes our Stressproof bolt stronger and more fatigue resistant. The Geissele Stressproof bolt is also forged, not machined from barstock. This allows us to optimize the grain structure of the steel to yield a bolt capable of 5 times the life of a mil-spec bolt. Each bolt is rigorously inspected, high pressure tested, mag particle inspected and Nanoweapon coated.

WARNING: California`s Proposition 65

Specifications for Geissele Super Duty Mod1 5.56mm, 16 inch Complete Upper:

Manufacturer: Geissele
Caliber: 5.56mm
Overall Length: 25.375 in
Barrel Length: 16 in
Barrel Profile: Tapered
Gas System Length: Mid Length
Barrel Twist Rate: 1-7
Firearms Threads Per Inch: 1/2x28
Handguard Type: Free-Float
Muzzle Device: Nanoweapon-coated HUXWRX Flash Hider- QD 556
Finish: Type 3 Hardcoat Anodize
Fabric/Material: Aluminum & Steel
Attachment Type: M-LOK
Handguard Length: 15 in
Gun Rail: M-LOK
Gun Type: Rifle
Gun Make: AR Platform
Barrel Material: Steel
Bolt Carrier Group Included: MIL-SPEC
Charging Handle Included: MIL-SPEC
Magazine Included: No

Package Contents:

  • Geissele Super Duty Mod1 16in Complete Upper

Geissele Super Duty Mod1 5.56mm, 16 inch Complete Upper Orderable Models

List of Orderable Models

  • Geissele Super Duty Mod1 Complete Upper, 16in, 5.56MM, DDC, 08-548S , MPN: 08-548S , UPC: 810081133678 , Code: 1TO-UFH-ADE18-08-548S
  • Geissele Super Duty Mod1 Complete Upper, 16in, 5.56MM, Black, 08-548B , MPN: 08-548B , UPC: 810081133654 , Code: 1TO-UFH-ADE18-08-548B
Compare (0)