# WTS Maxim RDB 9mm Carbine Length Roller Delayed Buffer System $125 OBO

**URL:** <https://njgunforums.net/t/wts-maxim-rdb-9mm-carbine-length-roller-delayed-buffer-system-125-obo/4920>\
**Category:** Closed Listing Archive\
**Created:** [August 25, 2026, 6:31pm UTC](https://njgunforums.net/t/wts-maxim-rdb-9mm-carbine-length-roller-delayed-buffer-system-125-obo/4920 "2026-08-25T18:31:21Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![kadayo](https://njgunforums.net/letter_avatar_proxy/v4/letter/k/3d9bf3/32.png) [@kadayo](https://njgunforums.net/u/kadayo)\
**Post date:** [August 25, 2026, 6:31pm UTC](https://njgunforums.net/t/wts-maxim-rdb-9mm-carbine-length-roller-delayed-buffer-system-125-obo/4920/1 "2026-08-25T18:31:21Z")

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### Barely used. 150 rounds exactly. In near new condition and functions perfectly.

### **ROLLER DELAYED BUFFER (RDB) SYSTEM – FOR 9mm AR PLATFORMS ONLY**

Maxim Defense’s Roller Delayed Buffer (RDB) System transforms your [9mm AR-pattern firearm](https://maximdefense.com/md9/) into a roller-delayed blowback system, reducing felt recoil and boosting reliability.  
By allowing gas pressure to stabilize before extraction, it ensures smoother operation while virtually eliminating friction common in standard buffer systems.

**NOTE: The RDB System is designed specifically for 9mm AR platforms and is not compatible with other calibers. The RDB system is not full auto rated.**

### **KEY FEATURES:**

- Reduces felt recoil
- Increases reliability
- Minimizes friction for enhanced performance

#### **IMPORTANT INSTALLATION NOTE FOR RDB SYSTEM**

To install the Roller Delayed Blowback (RDB) System, your 9mm bolt assembly must have an open channel to allow the guide rod to function properly during firing. For most 9mm bolts, meaning you will need to remove the pinned-in central mass. The central mass must be removable, but the [bolt carrier group (BCG)](https://maximdefense.com/bolt-carriers/) should retain its full length without it, to ensure proper function with the RDB system.

First to say I’ll take it gets the buffer.

Price $125 OBO

Free Shipping via USPS Priority to anywhere in the lower 48 states.

 ![IMG_2385](https://njgunforums.net/uploads/default/original/2X/9/9385ec929aacf48dd9fb0d67fa79a92d2346d990.jpeg)

 ![IMG_2384](https://njgunforums.net/uploads/default/original/2X/5/5fe159566832c33f4909561b180387b4fcddb9dc.jpeg)

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**Author:** ![DimDim](https://njgunforums.net/letter_avatar_proxy/v4/letter/d/bc8723/32.png) [@DimDim](https://njgunforums.net/u/DimDim)\
**Post date:** [August 26, 2026, 1:00am UTC](https://njgunforums.net/t/wts-maxim-rdb-9mm-carbine-length-roller-delayed-buffer-system-125-obo/4920/2 "2026-08-26T01:00:23Z")

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Pming

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**Author:** ![kadayo](https://njgunforums.net/letter_avatar_proxy/v4/letter/k/3d9bf3/32.png) [@kadayo](https://njgunforums.net/u/kadayo)\
**Post date:** [August 26, 2026, 1:32am UTC](https://njgunforums.net/t/wts-maxim-rdb-9mm-carbine-length-roller-delayed-buffer-system-125-obo/4920/3 "2026-08-26T01:32:12Z")

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Sold pending funds.

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<div class="post-metadata">

**Author:** ![kadayo](https://njgunforums.net/letter_avatar_proxy/v4/letter/k/3d9bf3/32.png) [@kadayo](https://njgunforums.net/u/kadayo)\
**Post date:** [August 26, 2026, 1:53am UTC](https://njgunforums.net/t/wts-maxim-rdb-9mm-carbine-length-roller-delayed-buffer-system-125-obo/4920/4 "2026-08-26T01:53:06Z")

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Sold.

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**Author:** ![NJGF-Admin](https://njgunforums.net/user_avatar/njgunforums.net/njgf-admin/32/139_2.png) [@NJGF-Admin](https://njgunforums.net/u/NJGF-Admin)\
**Post date:** [August 26, 2026, 2:32am UTC](https://njgunforums.net/t/wts-maxim-rdb-9mm-carbine-length-roller-delayed-buffer-system-125-obo/4920/5 "2026-08-26T02:32:37Z")

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