mounts
Once upon a time I purchased the M14 Airsoft RIS (Knights Impersonation). It looked good and fit but the problem is that it was machined from 6062-T0 aluminum and the REAL Knights is machined form 6062-T6 aluminum. Seems the same eh? Well, the T0-T6 makes a huge difference as T stands for Tempered and the 0 is soft and the 6 means hard.
Looks good and sounds good BUT if you do the reserch and tests you see that there is a difference.
It has been stated that the mounts to get are the Smith &/or Arms... if you are gonna go with something else be warned ahead of time. Airsoft guns have NO recoil and the real guns have alot of recoil. You might wreck your mount... and possibly your optic also... your choice.