This GB gun Heckler & Koch SP89 H&K SP 89 1989 VERY RARE! : Semi Auto Pistols at GunBroker.com with the front grip being sold, is the seller correct in that all you need is a $5 stamp to keep the front grip on the gun, and AOW??and"J grip". First is it not a K grip? Next how many parts does it take to be 922 compliant? And I thought to have a front grip you had to SBR you gun. I think this guy is a dealer, so Im sure he knows a lot more than I do, but can you guys tell me so I know. He will get away with a mistake, I will get a felony(not the luckiest guy in the world). Thanks.