Another optic from Firefield to consider is the Firefield Barrage 2.5-10x40 Riflescope and it is available at authorised sellers such as AGL Airsoft in the UK... "Airsoft is predominantly a close-quarters game with most shots fired within a range of 10 to 15 meters. The effective range of airsoft rifles generally extends to a range of 35 to 50 meters, depending on BB velocity.

From close-to mid-range engagements the Firefield Barrage 2,5-10x40 Riflescope is the ideal ready-for-anything optic. Built for rugged reliability and precision accuracy, Barrage Riflescope boast a 2-piece mount, IPX4 waterproof performance, 6061-T6 aircraft-grade aluminum construction, a red/green illuminated Mil-dot reticle and 1--hr. battery life."