Phone: 888.992.4867
Hours: Mon-Sat: 10am - 6pm
Address: 1900 E Baseline; Cornelius, OR; 97113

Airsoft Outlet NW Blog
Modify M4 Hop Up Unit M16 Metal Hop-up Chamber

More Views

Modify M4 Hop Up Unit M16 Metal Hop-up Chamber

Quick Overview

Best M4 hop up. Smooth, consistent adjustment, internal bushings

Regular Price: $32.00

Special Price $24.00

Out of stock



The Modify M4 hop up chamber is one of the first innovative M16 hop up designs in a long time. The geared hop up adjustment arm and built in nub make this hop up unit one of the most consistent designs for any M4 or M16 airsoft rifle.

Modify's chamber features a host of new improvements, including bearing sleeves on all the adjustment dials, and retention o-rings to keep the dials tight. An o-ring under the main knob keeps it from self-adjusting, so your hop up stays where you put it. Instead of the traditional spring tension and cam design, the new Modify M4 hop up unit uses a gear rack to precisely align the hop pressure arm. This eliminates any bounce, giving more consistent pressure against the bucking.  Additionally, a spacer is included to allow for adjustment in a wide range of AEG manufacturers.

The Modify M4 hopup chamber will fit any M4 airsoft AEG with a one-piece hop-up unit design, including Classic Army, G&G, SOCOM Gear, and other M4 and M16 AEGs. The precision construction of the Modify unit, along with the adjustment spacer, make it one of the most versatile hop-up units ever. In some cases, this unit will be compatible with more mags and enhance feeding reliability over the original hop-up unit.

0 Review(s)

Unmatched quality and service!

Founded in 2004, Airsoft Outlet Northwest (AONW) is the leader in quality airsoft and tactical gear in the Pacific Northwest. We're dedicated to providing the best service and products for our customers! We believe in honest and fair treatment of our customers while delivering superior value at a reasonable cost. That's why we offer the best warranty in the industry by providing in house warranty service on many quality brands like Classic Army, G&G, TopTech, and Echo-1. If you buy from us then you can rest assured knowing that you'll be taken care of.