Accurate carbine:

by Rob Leahy , Prescott, Arizona, Tuesday, May 08, 2012, 08:47 (4583 days ago) @ Byron

One inch bull barrel DPS upper a varmint /target barrel with 5.56 chamber. Accurate and reliable. Seen here with a Slide fire stock, this now has a standard lower- it did well in full auto, but not what I intended for this AR.

Or as Byron suggests, more power:

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Of the Troops & For the Troops