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Reaction Rod – Armorer’s Multi-Platform Upper Receiver Holding Tool

Reaction Rod – Armorer’s Multi-Platform Upper Receiver Holding Tool

$125.00 USD
$125.00 USD
Sale Sold out
Shipping calculated at checkout.

60 in stock

The Nefarious Arms Reaction Rod is a must-have tool for armorers and builders. Designed to securely hold your upper receiver in a vise, it is inserted through the rear of the upper receiver to lock into the barrel extension. It allows for precise installation or removal of muzzle devices, barrel nuts, and other components. The upper receiver can be indexed on the reaction rod for assembling the ejection port door and forward assist as well. 

  • Clamping Wing Nut Prevents Shearing of the Index Pin when Torquing the Barrel Nut
  • Rubber O-Ring Protects the Barrel Extension
  • White Zinc Coating for Anti-Corrosion

Made in the USA from durable steel with a corrosion-resistant zinc finish

Compatible with: 

  • Mil-Spec AR Uppers 
  • HK 416
  • MR556 / MR223 
  • KAC SR-15
  • KAC SR-16 E3 Barrel Extensions  

Whether you’re building or maintaining, the Reaction Rod ensures safety, strength, and precision.

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Let customers speak for us

from 42 reviews
Jake

Very high quality and definitely adds pressure to the system.

Enhanced Reliability Gas Piston
Enhanced Reliability Gas Piston
Sal

Top notch work and awesome service!

Custom Barrel Dimpling
Custom Barrel Dimpling
Meridian Ordnance LLC

Excellent option for the MR556A4 and 416 clones.

Nefarious Arms HK416 / MR556 Barrel, 14.5" LIGHT, 5.56x45mm NATO
Nefarious Arms HK416 / MR556 Barrel, 14.5" LIGHT, 5.56x45mm NATO
Sextus

Marvin and his products are top notch. Perfect fitment, excellent quality. These are the best barrels outside fo factory HK that one can buy!

Nefarious Arms HK416 A5 / G38 Barrel, 11", 5.56x45mm NATO
Nefarious Arms HK416 A5 / G38 Barrel, 11", 5.56x45mm NATO
Rick

Excellent parts / tools and fast shipping service

Nefarious Arms
Rick

For your barrel nut torquing a must have precision made tool. Excellent machined quality to use on a number of AR , KAC , Centurion Arms or HK variants.
Nicer than other popular and similar tools I have. protect your barrel extension index pin! Get one!

Reaction Rod – Armorer’s Multi-Platform Upper Receiver Holding Tool
Reaction Rod – Armorer’s Multi-Platform Upper Receiver Holding Tool
Brian Bell

Great part. Will install on my next build.

HK416 / MR556 / G36 Complete Gas Piston #50205381
HK416 / MR556 / G36 Complete Gas Piston #50205381
Brian Bell

Excellent service, fast shipping thank you!!

Nefarious Arms
Brian Bell

Excellent Quality, fast shipping what more could a man ask for. Thank you as always.

Barrel Nut - HK416 A5
Barrel Nut - HK416 A5
THANH D. LY

High quality and fast shipping

M110 / MKII Gas Block
M110 / MKII Gas Block
Anonymous

Quality is absolutely stellar. Nefarious arms nails it everytime

Barrel Nut - HK416 A5
Barrel Nut - HK416 A5
Anonymous

Quality is absolutely stellar. Nefarious arms nails it everytime

Enhanced Reliability Gas Piston
Enhanced Reliability Gas Piston
Zach Martin

Barrel is absolutely perfection. Knocked it out of the park

Nefarious Arms HK416 / MR556 Barrel, 10.4" HEAVY, 5.56x45mm NATO
Nefarious Arms HK416 / MR556 Barrel, 10.4" HEAVY, 5.56x45mm NATO
Zach Martin

Quality is absolutely stellar. Nefarious arms nails it everytime

Nefarious Arms
Anonymous

Quality is absolutely stellar. Nefarious arms nails it everytime

HK416 Ejection Port Axle
HK416 Ejection Port Axle