Roller Delayed Buffer System Info

Gen2 Order Here: Roller-Delayed Buffer System- Gen2 – Scheel Manufacturing (

RDBS Features:
-Lower Recoil
-Less “Dot Bounce”
-Faster Splits
-Quicker Follow-up Shots
-Lower Reciprocating Mass
-Reduced Fouling/Blowback in Receiver
-Complete Captured System -complete w buffer tube
-Upgrade any PCC- compatible with any 9mm, 40sw, 45acp AR15 that uses a standard buffer and buffer tube.
-No bolt Restrictions- Compatible with solid or hollow bolts- 9mm, 40sw, 45acp, Glock, Colt, etc..

The Scheel Manufacturing Roller Delayed Blowback Buffer System was designed to solve many of the issues present in the world of Direct Blowback Pistol Caliber Carbine (PCC) firearms. Our Patent-pending adjustable lockup allows a lower reciprocating mass as well as lower recoil spring pressures to reduce the "dot bounce" effect that can occur with heavy mass and heavy spring pressures that hinder even the best blowback PCC setups. This "Lockup" keeps the action "locked" until the bullet is out of the barrel and chamber pressure is reduced preventing powder blowback and fouling in the firearms' action. Currently blowback PCCs have a very narrow ammunition power-factor reliability window- they need to be setup for your specific ammo. Our RDBS runs great out-of-the-box with a wide variety of ammo from 115pf to 155pf and is tunable up or down from there. 

Developed winter 2020 and spring 2021 We have over 125,000 rounds through one of our systems with zero parts failures. In the short time we have been testing we have over 100 Match wins Including Multiple USPSA Area and many level2 match wins. The RDBS was pivotal in allowing the fast and accurate shots for Corey to finally earn his USPSA Grand Master Classification at the beginning of June 2021.

The Scheel MFG Roller-Delayed Buffer System Includes:

  1. Buffer Body- lockup rollers, arms and bumper installed.
  2. Pocketed Buffer Tube- 6 position Mil-spec diameter tube w/ lockup roller pockets. (A5 length tube available)
  3. Buffer Springs – 5 weak and 5 strong buffer body springs for complete adjustability. 2 spare of each
  4. Recoil spring- Lightweight Blue Recoil spring (5lbs).
  5. Spare Pins and Removable .4oz weight.


 1. Q: How does the buffer not rotate in the tube?

A. When I was building my first protptype I assumed I would have to add a keyway to keep the buffer from rotating, but I discovered the rollers are kept in line w the pockets because they drive the buffer straight in the tube like a roller skate. If it rotates a degree or two it is perfectly ligned back up when it detents back into the pocket.

 2. Q: What materials are the tube and rollers made out of?

A: The rollers are 4140 steel and the tube is 7075 aluminum.

3. Q: Does the aluminum tube hold up to the steel rollers?

A: I also assumed the forces would wear out an aluminum tube. I was wrong. It has not bulged or show any significant wear in over 30k rds on my unit and i have shooters w thousands of rds each on theirs.  I planned to have a steel tube made but real-world testing proves it is not needed.

4. Q: Do you make a Rifle length tube?

A: A rifle length system is in the works. We are currently testing our prototype. They will be for Sale soon.


  The key takeaways are:

1. Our buffer does the same thing as a regular buffer- it only changes at what time in the cycle the forces are applied to the buffer tube. When setup and tuned properly, half of the recoil force is applied at lockup and the 2nd half is applied when the buffer bottoms out in the tube. Because of our systems’ reduced weight and recoil spring pressure the “dip” that occurs when the bolt goes back into battery is minimized.

2.  Most of the force is still absorbed by the weight of the bolt and buffer. The rollers/tube interface does not recieve the full recoil force as in a mp5 system.