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Questions & Answers
can I use this on a foxtrot fm9 with 5 in barrel? Manufacturer Answer

If you use this PCC Buffer Weight/Spacer in a standard carbine buffer tube, it will add 2.5 oz and shorten the stroke by .75". 5" barrel guns don't run as hard as longer barreled PCCs so it's a matter of it your gun runs well with it or not. Also, short stroking the action is not always desirable. Short stroking increases recoil impulse, and you lose the use of your bolt catch. If you use this weight with an A5/AR10 carbine buffer tube, then you would have more weight but still have full stroke. This often feels softer. If you have a suppressor, this can also be desirable.

by Blitzkrieg Components, Manufacturer, December 3, 2024
Can this be used with the PCC RB-5020 short stroke buffer, a 308 rifle length buffer spring, and a Vltor A5 tube? Or will this make the system to long Expert Answer

No, this weight is to be used with either the standard RB5007 buffer or the RB5015HD buffer.

by Nick B., Gear Expert, November 4, 2021
Customer Reviews
Most Recent Reviews A little extra weight by bracketracer, Verified Owner, June 9, 2025
I’m working on tuning a blowback AR45 and the heaviest buffer I have found is 11 oz. I’m going to try swapping the standard carbine buffer tube for an A5 length tube so I can add this weight and see how it shoots. I believe this weight is the correct...
Read More...
Most Recent Reviews Buffer weight by Pk, Verified Owner, October 10, 2024
Haven’t tried them yet but seem to be a good weight
0/1 found this helpful
Most Recent Reviews Great quality!! by LTH, Verified Owner, October 27, 2024
Perfect fit for my FM9 and Kynshot buffer. Very soft shooting. Would buy again.
Most Recent Reviews Works as promoted by West Coast Guy, Verified Owner, October 13, 2024
Nice product. Does help reduce recoil in AR9 and AR15 models. Would definitely recommend to others.
Most Recent Reviews Nice weight by Alan Sanders, May 5, 2024
Works as it was designed. very good product. It's a weight and it works as designed.
Read All 5 Reviews
Color: Stainless Steel Gun Make: AR Platform Gun Model: Ruger Police Carbine Diameter: 998 inLength: .75 in, 0.75 inWeight: 2.6 ozCondition: New

Code: 3P7-RBF-BCNN10-R15015098

MPN: R15015098

UPC: 854476005393

List: $38.99Save 23%
$29.99

made-in-usa-flag Made in USA

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 Kynshot Pcc Buffer Weight/Spacer

Our PCC buffer weight can be used with either of our PCC hydraulic buffers to add mass in front of the buffer. It adds .75'' in length to the buffer system, adds 2.5 ounces in weight and is designed for a close fit in buffer tube to prevent tilting of the buffer during cycling. The weight has several functions - the additional mass further delays initial bolt movement and slows the bolt velocity, it helps to keep the buffer aligned in buffer tube and keeps impact straight on buffer for best effect and longest service life, and it's additional length can be used to make a short stroke system if desired. Has flats on 3 sides to allow for air flow.image

The PCC buffer weight is inserted into the buffer tube after you insert the buffer and spring, so the weight is in front in the buffer tube. During cycling, the weight is between the bolt and the buffer.

If you want to use this weight and have your bolt cycle the full distance and get behind the bolt catch, then you need to use an AR-10/A5 length buffer tube since they are .75'' longer on the inside. If you use this weight with our buffer in a typical AR-15 buffer tube it will create a short stroke system that stops forward of the bolt catch. Additional mass is very important in any PCC short stroke set up since the bolt doesn't have as much time to slow down. We believe this additional weight has a positive effect in any AR PCC build whether full stroke or short stroke and with any barrel length.

Optimal set up - We believe that the optimal set up for most 8-16'' barreled guns is to run this PCC Buffer weight in front of an RB5015HD buffer with a .308 carbine buffer spring in an AR10/A5 buffer tube for full bolt stroke. If your bolt has a weight pinned into the rear of it, we recommend leaving that in place to retain full mass of your bolt. We do have customers who like the short-stroke set up the best and everyone's perception is a bit unique, but it has been our experience that the full-stroke set up is the smoothest running and softest recoiling overall and you retain the use of your bolt catch. So full stroke either with or without this weight recommended.

This weight can be used with either the standard RB5007 buffer or the RB5015HD buffer. The weight is made of machined 17-4 Stainless Steel.

Specifications for Blitzkrieg Components Kynshot Pcc Buffer Weight/Spacer:

Manufacturer: Blitzkrieg Components
Color: Stainless Steel
Fabric/Material: Machined 17-4 Stainless Steel
Gun Make: AR Platform
Gun Model: Ruger Police Carbine
Diameter: 998 in
Length: .75 in, 0.75 in
Weight: 2.6 oz
Condition: New
Gas System Type: Short-Stroke Piston
Country of Origin: USA
Gun Type: Rifle

Features of Blitzkrieg Components Kynshot Pcc Buffer Weight/Spacer

  • Increased Mass: Adds 2.5 ounces of weight and 0.75'' in length to the buffer system, delaying initial bolt movement and slowing bolt velocity.
  • Improved Alignment: Ensures better alignment of the buffer in the buffer tube, preventing tilting during cycling for better impact and longer service life. (Results in more consistent impact.)
  • Short Stroke System (if desired): Can be used to create a short stroke system when paired with an AR-15 buffer tube.
  • Air Flow: Features flats on three sides to allow for air flow.
  • Versatility: Compatible with either the standard RB5007 buffer or the RB5015HD buffer, and can be used in a variety of AR PCC builds.
  • Machined 17-4 Stainless Steel
  • Increased Mass
  • Reduced Bolt Velocity
  • Super Smooth Running
  • Faster follow up shots
  • Keeps buffer aligned

Package Contents:

  • Blitzkrieg Components Kynshot Pcc Buffer Weight/Spacer

Blitzkrieg Components Kynshot Pcc Buffer Weight/Spacer Orderable Models

List of Orderable Models

Blitzkrieg Components PCC Buffer Weight/Spacer 2.5 oz., Stainless Steel, R15015098 , MPN: R15015098 , UPC: 854476005393 , Code: 3P7-RBF-BCNN10-R15015098

Blitzkrieg Components Kynshot Pcc Buffer Weight/Spacer Unavailable & Discontinued Models

List of Unorderable Models

USED Blitzkrieg Components Kynshot Pcc Buffer Weight-Spacer, R15015098, EDEMO1, Used, Condition Like New , MPN: R15015098-EDEMO1 , Code: 3P7-RBF-BCNN10-R15015098-EDEMO1
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