One of the recommended DMRs for airsoft use, the G&G TR16 MBR 308WH AEG is available at AirsoftZone, an Austrian airsoft retailer. This has a length of 965mm and 875mm when stock is retracted. Just like the newer G&G AEGs, this comes with the ETU as part of the package.  It has a low prifle bladed trigger and comes with a 14mm CCW thread if you want to attack a mock suppressor or tracer unit.