In reply to question about full size stock replacement for the model 510, you can order
one from Mossberg. The description is as follows:
Item # 14672 Description: STOCK ASM 20GA SYN Unit Price: $35.00 + shpg.
I ordered one and it took five weeks to get it. I ordered thru the Mossberg website and they
told me it would take about six weeks.
Here is the address it was shipped from: Maverick Arms, Inc.
Product Service Center
1001 Industrial Blvd.
Eagle Pass, TX 78853
FAX (830) 773-5893 PHONE: (800)363-3555
You might call and see if you can order direct from them.
If you can't, then call Mossberg Arms at 203-230-5300. (you may be on hold for awhile)
Hope this will be of help to those with the above subject.
PS: Put mine on today (3/31/13) and am really pleased with the difference in length and feel.
By the way, it will come with a new bolt and washers ( same as original ) I could only use the flat washer w/o the lock washer, but it tightened down real good.
LOP on new one is 14 inches.