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Questions & Answers
Will it allow factory 9mm Colt bolt lock back with bolt hold open? Kynshot heavy 9mm hydraulic buffer mention it will but this version doesn’t say! Manufacturer Answer

Yes it will, however, in order to use the RB5020SS, you will need to use an A5 buffer tube with a .308 carbine spring and a spacer.

by KynSHOT, Manufacturer, December 1, 2022
Will this work with a faxon bcg and jp 308 buffer spring? Expert Answer

This buffer is intended for lighter, competition type 9mm ammunition loadings for best performance and longest service life. You will likely need to utilize additional spacers and use a rifle length buffer tube when using an un-modified BCG. Email us at Techsales@opticsplanet.com for more information.

by Ethan, Gear Expert, November 17, 2022
Color:
Silver
Finish:
Stainless
Gun Make:
AR Platform
Gun Model:
AR-10, AR-15
Diameter:
0.75 in
Length:
5.3 in
Weight:
7.7 oz
Condition:
New

Code: 3P7-RBF-RBF9-RB5020SS

MPN: RB5020SS

UPC: 854476005270

List: $179.99Save $5.00
$174.99
Purchase Restrictions Purchase Restrictions

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Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Blitzkrieg Components RB502SS 9mm Competition Short Stroke Buffer

Get the soft recoil impulse and quick sight recovery youre looking for in your ultimate competition PCC AR15. The RB5020SS buffer provides longer length and more weight for those who desire a short stroke competition action. With a length of 5.3, this buffer will shorten the stroke of the bolt by 1.3 compared to our standard 9mm buffer when installed in a standard AR15 carbine buffer tube1. This is normally a shorter bolt stroke than most AR 9mm builds will function with and is therefore not recommended. When this buffer is installed in an A5/AR10 carbine length buffer tube this buffer will shorten the stroke of the bolt by .55, which can be increased by the addition of spacers2. Using this buffer in an AR10/A5 length carbine buffer tube is the recommended set up. AR15 carbine buffer tubes are 7" long on the inside. A5/AR10 carbine buffer tubes are 7 3/4" long on the inside. The damping level of this buffer is intended for lighter, low power factor, competition type 9mm ammunition loads for best performance and longest service life.image

1This may require a modified bolt in order to properly reset the trigger.

2This method is recommended when using an unmodified bolt in order to ensure a long enough bolt stroke for reliable trigger function.

Recommended buffer spring to use with this buffer and a 16" barrel is a JP .308 Rifle Buffer Spring (JPS-OSR-308). If shooting a PCC with a short barrel, a lighter spring may be required. 308 Carbine Buffer Springs such as the JP .308 Carbine Buffer Spring (JPS-OSC-308) or Sprinco Orange (SPRINCO-25762) are slightly less powerful and also work well on a lot of builds.

WARNING: California`s Proposition 65

Specifications for Blitzkrieg Components RB502SS 9mm Competition Short Stroke Buffer:

Manufacturer: Blitzkrieg Components
Color: Silver
Finish: Stainless
Fabric/Material: 17-4 Stainless Steel
Gun Make: AR Platform
Gun Model: AR-10, AR-15
Diameter: 0.75 in
Length: 5.3 in
Weight: 7.7 oz
Condition: New
Gas System Type: Short-Stroke Piston
Buffer Tube Size: Mil-Spec
Projectile Caliber: .355 Caliber
Operating Temperature: -30 - 150 Fahrenheit
Country of Origin: USA

Features of Blitzkrieg Components RB502SS 9mm Competition Short Stroke Buffer

  • Reduced Recoil: Hydraulic buffers significantly decrease felt recoil, improving shooting comfort and accuracy.
  • Enhanced Durability: Built with high-quality materials, these buffers ensure long-lasting performance and reliability.
  • Faster Follow-up Shots: By reducing recoil and improving cycling, shooters experience quicker and more precise follow-up shots.
  • Compatible Design: Designed for compatibility with popular pistol caliber carbines, these buffers are versatile and easy to install.
  • Machined 17-4 Stainless Steel Buffer Body
  • Most recoil reduction of any type of buffer
  • Mil-Spec rated hydraulic fluid and seals can operate in ambient temp of -30F to +150F
  • Super Smooth Running
  • Designed with more length and weight for short stroke competition actions
  • Quiet Buffer Operation
  • Reduced Spring Noise

Package Contents:

  • Blitzkrieg Components RB502SS 9mm Competition Short Stroke Buffer

Blitzkrieg Components RB502SS 9mm Competition Short Stroke Buffer Orderable Models

List of Orderable Models

  • Blitzkrieg Components 9mm Hydraulic Buffer Short Stroke, 5.3in, Stainless Steel, RB5020SS , MPN: RB5020SS , UPC: 854476005270 , Code: 3P7-RBF-RBF9-RB5020SS

Blitzkrieg Components RB502SS 9mm Competition Short Stroke Buffer Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, KynSHOT RB502SS 9mm Competition Short Stroke Buffer, Silver, RB5020SS , MPN: RB5020SS-DEMO , Code: 3P7-RBF-RBF9-RB5020SS-DEMO
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Last updated 2026-07-16 UTC.