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Questions & Answers
Will the muzzle already be pinned and welded before the customer purchases?

Yes it is pin & weld

by Dylan Gilmore, Verified Owner, May 18, 2025
Does this come with a charging handle? Expert Answer

The Geissele Super Duty Mod1 14.5in Complete Upper includes a charging handle and BCG.

by Ethan, Gear Expert, November 1, 2024
Customer Reviews
Helpful Positive Review
Beautiful Upper by Hawkeye, Verified Owner, May 31, 2024
Flawlessly beautiful upper. Shoots sub MOA with PSA 75 grain Black Sabre ammo with my OSS/Huxwrx suppressor. Not a true milspec upper receiver but will fit any milspec lower. Is lighter than expected. Would highly recommend.
7/7 found this helpful
Helpful Positive Review
GOD TIER TOOLS by Negrodomus, Verified Owner, April 24, 2025
As someone who takes their tools seriously, I'm always looking to make them more reliable and accurate. At the same time I'm looking for the best value as well. If you want a build that has maximum value/performance ratio the super duty line is it. ...
Read More...
1/1 found this helpful
Helpful Positive Review
Built to last. Excellent quality. by Mr Orange, Verified Owner, March 3, 2025
I only have really good guns so far. This one is my fave. It’s worth the money to buy, the money to upgrade, worth the money. Black for me but I may grab the DDC one day too. Love these uppers.
1/1 found this helpful
Most Recent Reviews
$G$ upper at a great price. by Akhoi, Verified Owner, November 29, 2025
Got this after coupon for a little less than a thousand dollars. Great price for the end of 2025. If you’re patient and wait for the right price with coupons, you can get the lowest priced Geissele upper here , better than everywhere else even durin...
Read More...
Most Recent Reviews
just buy it! by zamboni bob, Verified Owner, May 3, 2025
Love this upper. Can’t wait to shoot it some more!
Most Recent Reviews
The build is finally complete by nfp3880, Verified Owner, April 24, 2025
The price was right so I had to jump on it. I can finally complete this year-long build.
Read All 7 Reviews
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Product Info for Geissele Super Duty Mod1 14.5in Complete Upper

The Geissele Super Duty MOD1 Upper (Complete) features the latest in weapon technology available exclusively from Geissele Automatics. This 14.5in complete upper chambered in 5.56mm features a nanoweapon-coated HUXWRX Flash Hider-QD muzzle device pinned and welded to an 14.5in 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 mid length 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, 13.5in 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 14.5in Complete Upper:

Manufacturer: Geissele
Caliber: 5.56mm
Barrel Length: 14.5 in
Barrel Twist Rate: 1-7
Fabric/Material: Steel
Magazine Included: No

Package Contents:

  • Geissele Super Duty Mod1 14.5in Complete Upper

Geissele Super Duty Mod1 14.5in Complete Upper Orderable Models

List of Orderable Models

  • Geissele Super Duty Mod1 Complete Upper, 14.5in, 5.56MM, Black, 08-547B , MPN: 08-547B , UPC: 810081133692 , Code: 1TO-UFH-ADE17-08-547B
  • Geissele Super Duty Mod1 Complete Upper, 14.5in, 5.56MM, DDC, 08-547S , MPN: 08-547S , UPC: 810081133708 , Code: 1TO-UFH-ADE17-08-547S
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