Enhanced Buffer, Spring & Buffer Tube Assemblies for Viper PDW Stocks & Braces

Description
Questions and Answers
Disclaimers

Gen 2 Enhanced Compact Buffer Tube, Spring & Buffer for Viper PDW Stocks & Braces

Black Rifle Arms patented Enhanced Compact Buffer Tube, Spring & Buffer Tube Assembly allows for Strike Industry Viper PDW Stocks and Braces to be finely tuned with different buffer weights from E-Series Standard to Heavy Buffers.

Our pistol buffer enables the Strike Industry Viper PDW stock and braces to run pistol calibers. The receiver extension (buffer tube) is 5 5/8" in overall length. This kit is a drop in replacement and you can utilize the Strikes cheek piece, as well. The E-Series Heavy buffer ensures reliable operation with select-fire weapons.

Kit Includes 1-Qty each:

Spring
Buffer Tube - Gen 2

Flutes on receiver extension allows Strikes Cheek Rest to be utilized
Hybrid tube has a relief cut to enable the use of an End Plate and Castle nut should it become necessary to convert to a pistol tube. (See our Compact Pistol Tube Kit)
Machined from Aircraft quality aluminum billet
Mil-spec Hard coat anodized finish

E-Series Buffers offer:

New and Improved E-Series Buffers
Superior Buffering Properties over our original PDW Compact Buffers
Acts as a Dead Blow Hammer to Counteract Carrier Bounce

E-Series Buffer Weights:

E-Series 3 oz Buffer
E-Series 4 oz Heavy Buffer and Spring (new look has black buffer)

Heavy Buffer is needed to run full-auto

Radial Delay Blowback use PDW E-Series Buffers

An example of a Strike Industries Viper PDW Stock being converted over to our compact buffer, spring with buffer tube assembly to allow for adjustability of buffer weights.
Rifle not included

View all Q&A

Q: I am currently trying to get a super safety to work with district industries PDW stock. I'm getting light strikes and according to atrius this is usually caused by the buffer and spring not being heavy enough. Is the heavy option buffer and spring heavier than What comes from strike industries?

Asked by: Andrew Martin - 5/6/2026

A: You would need the our Strikes Industries Viper Kit: buffer tube, spring and buffer. This will still not get you to run a super safe to run reliability though. What we have found that ties it all together is our Enhanced Bolt Carriers, we have a polymer that we use on the end that absorbs some of the shock which prevents carrier bounce. We have known this due to we run full auto, but now that FRT's are on the market this is what our customers use to resolve their FRT issues. This is a link to our Enhanced Bolt Carriers and on that page is a video that shows our founder demonstrating our Enhanced Bolt Carrier with a FRT compared to an all steel carrier. https://www.blackriflearms.com/ENHANCED-BOLT-CARRIERS-_c_10.html

Answer provided by: Administrator (5/8/2026)

Q: Is there an H3 buffer option?

Asked by: ace case 438 - 7/27/2025

A: Sorry we do not offer an H3 PDW buffer.

Answer provided by: Administrator (8/1/2025)

Q: Is there ears for the buffer retaining pin? It doesn't show in the picture and I have seen the original viper tube has them and why this one doesn't have it?

Asked by: johnjohnlepocon - 9/29/2024

A: You do not need the ears to go around the retaining pin, the ears do not hold the retaining pin in place so we designed it just like a mil-spec receiver extension/buffer tube.

Answer provided by: Administrator (10/1/2024)

Q: I’m running 7.5” 300blk suppressed with strike industries pdw brace having cycling issues also added adjustable gas block still has not fixed the problem. Would this kit do the job and if so which buffer and spring should I go with?

Asked by: Jake - 8/12/2024

A: We don't know how your firearm is gassed so we can't give you an definitive answer; however, some customers with similar builds have found that Enhanced Compact Buffer Tube with Light Spring & Carbine or H2 buffer has resolved similar issues.

Answer provided by: Administrator (8/29/2024)

Q: Is the pistol caliber buffer only compatible with pistol caliber? Is it because if the size of the round (ie dimensions)? Or can it fit in a 5.56 system. I am curious because the weight is similar to that of a H4 buffer. Would like the benefits of a heavier buffer. Thank you

Asked by: Zulu - 5/14/2024

A: Yes pistol buffer is only for pistol calibers.

Answer provided by: Administrator (5/20/2024)

Q: What make the included buffer tube different than the one from Strike Industries so that it can accept the buffers included in your kit?

Asked by: Luz - 5/14/2024

A: Our spring and buffers are of different dimensions than the Viper PDW. Our buffers will not work with Strikes springs.

Answer provided by: Black Rifle Arms Sales Team (6/17/2024)

Q: Hello, is it possible to drop in a 3rd party buffer into this system if need be? For example if I want to use a standard H3 or H4 buffer? Are the buffers in this kit industry standard buffers? Thank you

Asked by: Zulu - 5/8/2024

A: No you can't. The whole kit is a PDW that was specc'd out to work in combination with each other. You can't mix mil-spec and PDW with this kit.

Answer provided by: Black Rifle Arms Sales Team (5/8/2024)

Q: I have a 5.5 ar chambered in 9mm. It is select fire. Which buffer weight would be recommended? The h2 or the pistol?

Asked by: Jimmy Zaragoza - 2/26/2024

A: The pistol buffer is meant for pistol caliber AR-15, so pistol buffer would be what you need to select for your setup.

Answer provided by: Administrator (2/28/2024)

Q: I have a 5” 5.56 what weight buffer would I need? And the stock viper tube length won’t work?

Asked by: Jay - 1/10/2024

A: Typically and most likely a H2 buffer; however, we can't guarantee that is what you would need as we don't know how your firearm is gassed. Yes you have to use our buffer tube to make the system work.

Answer provided by: Administrator (1/10/2024)

Q: If I have the viper pdw brace already, do I have to get the tube and spring also or can I purchase the buffer alone? Also is the cqb buffer compatible with the hbpdw honey badger brace?

Asked by: Karl Chambers - 11/24/2023

A: You have to buy the kit in order for the setup to work. All the components are finely tuned (specc'd) to work together.

Answer provided by: Black Rifle Arms Sales Team (11/24/2023)

Questions about this item? Ask here.

CHECKOUT MINIMUM

TIME TO FULFILL ORDERS

AVERAGE SHIPPING TRANSIT TIMES
NOT INCLUDING HOLIDAYS

Enhanced Compact Buffer Tube, Spring & Buffer Assemblies for Viper PDW Stocks & Braces - Gen 2

Choose Options

Q: I am currently trying to get a super safety to work with district industries PDW stock. I'm getting light strikes and according to atrius this is usually caused by the buffer and spring not being heavy enough. Is the heavy option buffer and spring heavier than What comes from strike industries?

Q: Is there an H3 buffer option?

Q: Is there ears for the buffer retaining pin? It doesn't show in the picture and I have seen the original viper tube has them and why this one doesn't have it?

Q: I’m running 7.5” 300blk suppressed with strike industries pdw brace having cycling issues also added adjustable gas block still has not fixed the problem. Would this kit do the job and if so which buffer and spring should I go with?

Q: Is the pistol caliber buffer only compatible with pistol caliber? Is it because if the size of the round (ie dimensions)? Or can it fit in a 5.56 system. I am curious because the weight is similar to that of a H4 buffer. Would like the benefits of a heavier buffer. Thank you

Q: What make the included buffer tube different than the one from Strike Industries so that it can accept the buffers included in your kit?

Q: Hello, is it possible to drop in a 3rd party buffer into this system if need be? For example if I want to use a standard H3 or H4 buffer? Are the buffers in this kit industry standard buffers? Thank you

Q: I have a 5.5 ar chambered in 9mm. It is select fire. Which buffer weight would be recommended? The h2 or the pistol?

Q: I have a 5” 5.56 what weight buffer would I need? And the stock viper tube length won’t work?

Q: If I have the viper pdw brace already, do I have to get the tube and spring also or can I purchase the buffer alone? Also is the cqb buffer compatible with the hbpdw honey badger brace?

Related Items

Recently Viewed Items

CHECKOUT MINIMUM

TIME TO FULFILL ORDERS

AVERAGE SHIPPING TRANSIT TIMES NOT INCLUDING HOLIDAYS

Enhanced Compact Buffer Tube, Spring & Buffer Assemblies for Viper PDW Stocks & Braces - Gen 2

Choose Options

Q: I am currently trying to get a super safety to work with district industries PDW stock. I'm getting light strikes and according to atrius this is usually caused by the buffer and spring not being heavy enough. Is the heavy option buffer and spring heavier than What comes from strike industries?

Q: Is there an H3 buffer option?

Q: Is there ears for the buffer retaining pin? It doesn't show in the picture and I have seen the original viper tube has them and why this one doesn't have it?

Q: I’m running 7.5” 300blk suppressed with strike industries pdw brace having cycling issues also added adjustable gas block still has not fixed the problem. Would this kit do the job and if so which buffer and spring should I go with?

Q: Is the pistol caliber buffer only compatible with pistol caliber? Is it because if the size of the round (ie dimensions)? Or can it fit in a 5.56 system. I am curious because the weight is similar to that of a H4 buffer. Would like the benefits of a heavier buffer. Thank you

Q: What make the included buffer tube different than the one from Strike Industries so that it can accept the buffers included in your kit?

Q: Hello, is it possible to drop in a 3rd party buffer into this system if need be? For example if I want to use a standard H3 or H4 buffer? Are the buffers in this kit industry standard buffers? Thank you

Q: I have a 5.5 ar chambered in 9mm. It is select fire. Which buffer weight would be recommended? The h2 or the pistol?

Q: I have a 5” 5.56 what weight buffer would I need? And the stock viper tube length won’t work?

Q: If I have the viper pdw brace already, do I have to get the tube and spring also or can I purchase the buffer alone? Also is the cqb buffer compatible with the hbpdw honey badger brace?

Related Items

Recently Viewed Items

AVERAGE SHIPPING TRANSIT TIMES
NOT INCLUDING HOLIDAYS