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Reaction Rod
Reaction Rod
Reaction Rod
Reaction Rod
Reaction Rod
Reaction Rod
None
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GEISSELE AUTOMATICS LLC - Reaction Rod

20 Reviews
Reaction Rod
Brownells #
100011315
MFR #
10-169
UPC
854014005298
$105.00
Coupon Code
Purchase Limit Help

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Specifications
Color:
Black
Caliber:
223 Caliber
Item Weight (lbs):
3.000
Item Height (Inches):
1.000
Item Width (Inches):
1.000
Item Length (Inches):
11.250
Make Model Fit:
AR-15.Universal
Material:
4140 Steel
Quantity:
1
Restriction
Gun Tool Restriction:
Yes
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International purchase information

What is the GEISSELE AUTOMATICS LLC - Reaction Rod?
The Geissele Reaction Rod (5.56/.223) makes the removal and installation of barrels, flash hiders, gas blocks and hand guards much easier and simpler.

The Reaction Rod is designed to be gripped in a bench vise so that the rod is either horizontal or vertical. The upper receiver is then slid onto the rod and the rod’s integral splines enter the barrel extension and secure the barrel extension from turning. This allows all the torque from barrel nut wrenches to go directly into the barrel extension. In contrast, receiver vise blocks transmit the turning force into the aluminum receiver, a good part of which passes through the small, easily distorted receiver index pin. With the Geissele Reaction Rod, marring of an upper receiver’s finish by gripping and twisting inside vise blocks is eliminated and so is the need to remove sights and mounts from the receiver’s M1913 rail.

See all of our AR15s and AR15 parts here.

Gun Tool Restriction
Gun Tools have restricted shipping to CA.

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AR-15/M16 REACTION ROD REVIEWS

4.9
20 Reviews
5 Stars
90%
4 Stars
10%
3 Stars
0%
2 Stars
0%
1 Stars
0%
Reviews Summary
The AR-15/M16 Reaction Rod by Geissele is praised for its sturdy build and ease of use, making barrel and upper receiver work a breeze. While many consider it essential for AR builds, concerns about its high price point persist. Reviewers emphasize its effectiveness in preventing stress on receivers and appreciate the secure grip it provides during assembly and disassembly tasks.
What Reviewers Are Saying
Product Quality
85%
Reviewers consistently highlight the exceptional build quality of the Geissele Reaction Rod, noting its solid metal construction and durability. Many appreciate that the tool performs effectively, ensuring that tasks like mounting and dismounting barrels can be completed without risking damage to the upper receiver.
Ease of Use
80%
Users frequently commend the simplicity of using the Reaction Rod, which allows for easy installation and adjustment of barrels and accessories. The design enables smooth rotation and positioning of the upper receiver, making it a time-saving tool during builds or maintenance.
Value for Money
60%
While many express that the Reaction Rod offers high value due to its quality and performance, several reviewers find it overpriced. Despite this concern, most agree that its unique features justify the cost, especially for those who frequently work on AR platforms.
Versatility
70%
The Reaction Rod is praised for its versatility, with users highlighting its effectiveness for various AR build tasks such as installing muzzle brakes and handguards. This adaptability makes it a favored choice among enthusiasts who undertake multiple projects.
Customer Service
20%
Reviewers speak positively about the customer service from Geissele and associated retailers, noting prompt and helpful responses in regard to pricing and product inquiries. This aspect enhances the overall purchasing experience for customers.
5
Works like a charm!
Does exactly what it's designed to do. I wish I had purchased it years ago.
by MARK A. PILCHER on June 13, 2025
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5
Quality Tool
Once you understand how a reaction rod works, you'll want them for any AR muzzle work. Watch the YouTube "School of the American Rifle" channel, they have a great video on why you want to use a Reaction Rod for muzzle work. This is a solid, beefy tool, made of heavy steal. You can feel the quality and it locks up nicely when mounted in a vise. This tool doesn't bend, or crack unlike some cheaper polymer AR blocks and you can really wrench down on your rifle if need be.
Would you recommend this? Yes, I would recommend to a friend
by KEVIN COMSTOCK on April 23, 2025
Verified Purchase
Was this review helpful? 0
5
Geisselle Perfection
If I were to come up with a complaint I'd say it's heavy, but the subject says it all, I can't think of a way to improve this. If you can afford this get this over the other stuff. For me rotating the barrel as I work is a really nice feature.
by Lawrence on May 09, 2024
Verified Purchase
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5
Geissele Reaction Rod Scores!
I had to wade through several less useful upper receiver mounting blocks before I finally opted for this Geissele reaction rod. Don't let cost deter you. The reduced stresses on your upper receiver and your mind is well worth it! All the torque stays in the barrel, not the receiver. Easy to use, no fumbling with clam-shell halves. Nicely finished and stout!
by Gunner on December 04, 2020
Was this review helpful? 2
5
Great tool
I really wish I had known about this tool with my earlier builds. I mainly use it for dimpling barrels and muzzle devices so nothing major. It's great because I can just rotate the whole upper receiver as I need to change angles/lighting/etc and it makes jobs a snap. Overall this is a great investment.
by Blake from AZ on August 06, 2020
Was this review helpful? 2
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Customer Questions
21 Questions