Product Description
UPDATE: Due to shortages in factory CZ parts I am making available a "Stripped Lower" option. For this option you will have to transfer over the slide release, slide stop spring pin, slide stop spring, disassembly pin and disassembly pin spring from your factory lower. On the next batch I will have all of these parts manufactured myself to eliminate the need to rely on CZ to make these lowers available.
New for Gen 3: The latest version of the Haga Defense Bren 2 Lower Receiver now has built-in ambidextrous slide release controls, is lighter and includes factory CZ slide release and disassembly pin so that you won't need to transfer any parts over from your factory lower.
Aluminum lower receiver for the CZ Bren 2 that accepts *AR15 triggers, grips, mag releases and selector switches. Will NOT work with all AR triggers. Hammer width must be .25" or wider to dissengadge the Bren 2's firing pin safety. See "Installation Instructions" link below for more info.
SPECIFICATIONS:
- Will work with both the 762 and 556 versions. 762 requires the use of AR15 762 (x39) magazines
- Built-in ambidextrous slide release controls
- Flared magwell
- 7075 Aluminum
- Hardcoat anodized
- Weight with included parts: 12.9 oz
Factory CZ Parts Included:
- 3710043101: SLIDE RELEASE
- 3710058001: SLIDE STOP SPRING PIN
- 3710084001: SLIDE STOP SPRING
- 3710075001: DISASSEMBLY PIN
- 3710076001: DISASSEMBLY PIN SPRING
Parts you will need to aquire sepparately:
- AR15 Grip
- AR15 Trigger
- AR15 Safety Selector
- AR15 Magazine Catch/Release
The Bren 2 lower is not a serialized part and does not require transfer through an FFL holder.
*AR15 Parts Compatibility: See Installation Instructions for more information.
INSTALLING AMBIDEXTROUS BOLT RELEASE: If purchasing the "Stripped Lower" option the ambi bolt release will come loosely assembled in the gun. The left button will slide rearward allowing the assembly to be removed. When reassembling the button(s) you will need to use the included spring and detent to lock the button in place. Drop in the small spring first then insert the detend until flush. While holding the detent flush slide the button into place until you hear a click. Be careful with this step as it is easy to launch that detent into space. Or your eye..
Fit Issues:
In some situations different stock/brace endcaps may allow the lower to rock back and forth a little or "wiggle". An easy fix for this is to add some thickness to the metal tab where shown below. A small rectangular piece of electrical tape cut to fit this space usually works perfectly.
Product Videos
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Product Reviews
13 Reviews Hide Reviews Show Reviews
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Cz Bren 2 Billet lower receiver
Well made well engineered beautiful product Just wished they could come up with a way to use more drop in AR triggers
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Fantastic Addition to a Great Rifle
This lower is phenomenal in function, appearance and durability. Well done!
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Bren 2 Lower
Fit and finish is excellent. I used a BCM gunfighter grip that fit perfectly, an LWRC grip I had wouldn't fit at all. CMMG ambi-mag release and a Rise Rave 140 trigger function flawlessly.
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More than what I expected!
I have been waiting for this lower to come back in stock for a long time, I always seemed to miss them with my busy schedule. I built it with a Geissele lower build kit and ALG Defense 4lb trigger. This thing is amazing! Running flawless and being able to put a B5 grip has changed this firearm night and day. Worth every penny and make sure to get the rear sling delete at the same time. Great customer support and a great product! If you are thinking of getting one, just send it, you won't regret it!
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Bren 2 lower
Superior quality and fast shipping. One my trigger gets here, it will be going right into my bren 11” pistol.
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Bren 2 lower
Excellent product, fixed all my issues with the Bren. Including a no feel trigger and better grips.
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Great on all accounts
Quality of the product is unrivaled, and customer service is punctual and helpful. Would recommend.
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The Best Bren Upgrade
The Bren lower from Haga Defense is easily my best choice for upgrading my firearm. It can easily accept one of my favorite triggers, and any pistol grip I want. That choice of grip is crucial to my use of the firearm. That immovable stock that come standard is horrible, I love the firearm but that grip is an atrocity. I only regret is that I can't give this thing more stars at a time!
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Haga Defense Bren 2 Aluminum Lower Receiver
Very well made and designed. Works great with Franklin BFS3 Binary trigger. Recommend you use CMC anti-walk pins.