Comes pre-fitted with valve, feed lips and gas router - you do not need to use any donor parts. No assembly is required. Its very well engineered (specially with the recomended pts mags but works with the others too very well made) Looks in perfect keeping with the lines of the original mags and doesnt stick out. £99 on airtac im selljng for £69.99 as priced to sell. many thanks.
eBay