I mentioned about this here some time ago:
https://www.sideshowcollectors.com/...and-or-Props&p=6453365&viewfull=1#post6453365
This airsoft Sterling nice, but the price is around $500, which even by airsoft fans is is too much, as for SW fans you can get an ok deact. Sterling for that money or just a bit more, if you know where to look. This airsoft is a copy of MGC Sterling and Canadian C1 Sterling which was used for ROTJ Stormtrooper blasters. And not even this is 100% accurate, the front muzzle part is unfortunately taken from a regular Mk4 L2A3 Sterling. So you get a combo, not a very accurate piece.
And you would need to upgrade this airsoft version as well. If you want to make it ANH despite its origins for ROTJ E-11 you would need t-tracks (Marv, Gino or Blastech), M38/M40/M19 tank scope and scope rail - all these are a must to make a base ANH E-11. The following greeblies are optional, but would add up to the blaster itself: Hengstler counter with its bracket and cylinders. And you need to shorten the clip, not sure if possible with the airsoft in a way not to damage it.
If you go ROTJ you need a different type of scope where half of it is resin IIRC and with a different type of rail. The T-tracks are replaced by metal U shaped strips. And you need to add a few new greeblies on the side of the E-11.
So in the end not sure if this is worth $500, considering you can get the real deal for similar price, and you need to upgrade both of them with greeblies and parts.
Below is a chart photo set showing the differences between ANH and ROTJ Stormtrooper blasters, including the original base guns used: Sterling Mk4 L2A3 for ANH and Sterling MGC for ROTJ, then pitures of the screen used E-11 and finally of some cool fan made ones using the real deal:
ANH E-11:
ROTJ E-11: