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AR15.COM
1/4/2026 3:28:12 PM EDT
[Last Edit: Odinforever2000][Edited]
The Cheapest Bullpup You Can Buy — But Is It Any Good?

RDB Defender

-Highlights-
4k round through it
It works
Least expensive rifle on the Market.
Lots of Sling Mounts
Fully Adjustable Gas System very nice at its price point
Great trigger
Shots out to 550 are good.
Calls Out Haga for rear Stock and Lucky Irishman (he didn't know the name) Bolt release and Handguard
Ejection makes Suppressed use easy.

Cons -
Quirky
Barrel profile a bit too thin on the Defender model
Significant POI shift when adding a Can due to Thin Barrel
3-4 moa.
Pic Rail a bit short.
Keltec Handguard has movement.
Bolt Release is stiff on Empty mags
Hard to Diagnose Issues due to Ejection
Wishes there was a premium version of the rifle.

*Whoops Wrong Forum*
1/4/2026 4:08:41 PM EDT
[#1]
I like mine. Suppressed, it's still comparable in length to my suppressed 11.5". It even works well gas-wise with an old M4-2000.  It's a little weird the first (and second) time you feel it drooling brass down your pantleg, but I like it. Mine came with an upgraded handguard. I may put the OEM one back on one day to check it out, but I'm in no hurry.

Attached File

Disclaimer - OP is bad at knowing things, and might catch on fire.
Vet - Op MMAMA
Every other species kills off their stupid......we cater to them. -- spin-drift
Nobody ever called 911&said I just did something smart. -- TheFlynDutchman
1/4/2026 10:20:07 PM EDT
[Last Edit: m200maker][Edited] [#2]
I like a lot of the Keltec products. I’m just not sure I would like the kommifornistan compliant version. Otherwise I’d probably already own one. Attached File


It is really cool of Keltec to support those of us behind enemy lines. They have other products that are available and compliant. That a lot more than most manufacturers do.
1/5/2026 2:02:18 PM EDT
[#3]
I have never considered a Bullpup as a precision rifle.
A real 1 MOA All Day shooter.
1/5/2026 2:38:09 PM EDT
[#4]
My SRU Precision bullpup chassis kit for the AR shoots about the same accuracy wise.
1/13/2026 10:57:17 AM EDT
[#5]
Quote History
Originally Posted By bluedog82:
My SRU Precision bullpup chassis kit for the AR shoots about the same accuracy wise.
View Quote

My Ar15 and RDB shoot about the same accuracy wise.
1/24/2026 12:46:43 AM EDT
[#6]
I got the RDB S a couple years ago.  I haven't shot it a whole bunch but it's super handy, light and reasonably accurate with the dot I have on it.  I ditched the folding front iron sight in lieu of a suppressor mount.

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