RDB stands for Rifle Downward-ejecting Bullpup and the 17 points to the barrel length. This variant is the original and features a high-impact resistant Zytel forend with built-in Picatinny-style rail on the bottom for mounting accessories. Like all the RDB variants it’s completely ambidextrous accurate and compact.

Specifications:

CALIBER: .223Rem
WEIGHT UNLOADED: 7.1lbs
MAGAZINE CAPACITY: 20 or any AR15 Magazine
OVERALL LENGTH: 30.6"
BARREL LENGTH: 20"
TWIST RATE: 1:7?
TRIGGER PULL: 4lbs

Additional information

UPC	640832005998
Manufacturer	KelTec
Manufacturer Part Number	RDB20TAN
Action	Semi-Auto
ATF Type	MODERN SPORTING RIFLE
Barrel Length	20"
Caliber/Gauge	.223 REM/5.56 NATO
Capacity	20
Color	Black
Length	37
Number of Magazines	1 20 rd.
Package Height	4.0
Package Width	10.5
Product Type	Rifle
Rate of Twist	1:7"
Safety	Ambidextrous
Shipping Weight	9.74
Sights	No
State Restriction (CA)	NO DIRECT SHIP TO CALIFORNIA
State Restriction (IL)	NO SALE TO ILLINOIS PICA
State Restriction (OR)	NO SALE TO OREGON
State Restriction (RI)	NO DIRECT SHIP TO RHODE ISLAND
State Restriction (WA)	NO DIRECT SHIP TO WASHINGTON