▁To xic ▁ ▁Sho cker ▁N XT ▁( 2 0 0 6 - 2 0 0 9 ) ▁ ▁In ▁late ▁ 2 0 0 6 , ▁Sm art ▁Part s ▁released ▁the ▁Sho cker ▁N XT , ▁which ▁is ▁an ▁improved ▁version ▁of ▁the ▁Sho cker ▁S FT . ▁It ▁has ▁the ▁same ▁basic ▁shape ▁and ▁operation ▁as ▁the ▁Sho cker ▁S FT , ▁same ▁intern als ▁and ▁sol en oid , ▁and ▁similar ▁electron ics . ▁However , ▁it ▁features ▁a ▁number ▁of ▁enh anc ements ▁from ▁the ▁factory , ▁which ▁are ▁designed ▁to ▁drive ▁it ▁to ▁a ▁higher ▁performance ▁and ▁greater ▁reli ability . ▁Of ▁these ▁include ▁the ▁following : ▁ ▁Imp ulse / I on ▁thread ed ▁bar rel ▁( this ▁became ▁the ▁" standard " ▁Sm art ▁Part s ▁bar rel ▁thread ) ▁ ▁New ▁feed ne ck ▁thread ing , ▁in compatible ▁with ▁the ▁previous ▁models ▁ ▁Break ▁beam ▁V ision ▁eye ▁system ▁( standard ) ▁ ▁High ▁E ffic iency ▁b olt ▁( HE ) ▁standard ▁( ▁All ▁Sho cker ▁b olt ' s ▁have ▁the ▁same ▁thread ▁pattern ! ▁So ▁you ▁may ▁use ▁different ▁bol ts ▁on ▁your ▁Sho cker .) ▁ ▁Red es igned ▁vertical ▁AS A ▁adapter , ▁shift ed ▁the ▁for eg rip ▁forward ▁ ▁Red es igned ▁vertical ▁reg ulator ▁ ▁Integr ated ▁bottom line ▁do vet ail ▁rail ▁ ▁Lar ger ▁trigger ▁guard ▁space ▁ ▁Red es igned ▁dual ▁pl ung er ▁style ▁ball ▁det ent ▁ ▁Red es igned