Thanks for the question.

Trigger jobs come in all different prices, as the gun is mil-spec most - if not all - commercial AR15 triggers will fit the gun, these range from £80 to £400 and can be purchased via retailers such as Rifleworks or Brownells. There are two types, a parts kit where you assemble the trigger yourself or, the second type is a drop in unit. The latter is very simple to install... pop out the two retainer pins holding the trigger and hammer mechanism... remove all the parts... put the unit in its place, reinstall the pins. Job done.

The importer and distributor of the rifle is Shield Sights. www.shieldpsd.com

I purchased the required expansion rail off him last week, friendly company owner and the process was very quick and simple.

Andy