The American Civil War Research Database, Historical Data Systems, a subscription service, has a complete roster of 1393 men, unfortunately, no individual detailed service data is found inasmuch as the Compiled Service Records, (see Fold3) record only two muster rolls for companies of the regiment, many of the men have but only one card

Dawson's-Hardy's AR Infantry
http://www.civilwardata.com/active/hdsquery.dll?Muster?a=1265&b=C&c=&d=1

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Dawson's afterwards Hardy's Regt. Ark. Infantry

C. L. Dawson - Colonel - R March 64
Wm. R. Hardy - Lt. Col., Col.
F. H. Wood - Major, Lt. Col.
W. D. F/Testter - Major

Dawson's Regiment Arkansas Infantry*

* That part of the 19th Regiment Arkansas Infantry (Col. C. L. Dawson) which was not captured January 11, 1863, at Arknasas Post, Ari., with a like portion of the 24th Regiment Arkansas Infantry and Companies A and B, Crawford's Battalion Arkansas Infantry, were consolidated into a Regiment and designated Dawson's (subsequently Hardy's) Regiment Arkansas Infantry

Only two muster roll exist for the regiment, Company A records for the periods:

June 30 to Aug. 31, 1863 stationed at Camp Clark

&

Dec 31, 1863 to Feb. 29, 1864 at Camp Sumpter

M317: Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Arkansas