I have compiled this list for the purposes of sharing information only. Disclaimer: This list is correct to the best of my knowledge, however, I accept absolutely no responsibility for the accuracy of this information or for the consequences and/or damages occurring from any inaccuracies. Lady I spoke with told me any serial number L051000 or lower was an assembled Pre-Ban Rifle. No luck, records don't go back that far (LOL). Spent some time last week with Bushmaster trying to find the original date of manufacture. The lower is marked.223/5.56, barrel is marked 5.56 -1/9 twist. It has a pinned muzzle break and comes with a hard case, manual, strap, and 10 round magazine. Bushmaster A3/M4 (Model XM15-E2S) Description: We are offering a new Bushmaster A3/M4 (Model XM15-E2S). This and all future requests should be directed to this URI. Generally, the barrel may have the model number of an antique gun and old Winchesters in particular had markings on the barrel part identifying the type of gun model.

On antique receivers, the serial numbers may be found on the side of the gun body.

Bushmaster serial number list