There are several reasons for you to build a 9mm AR based pistol or SBR. The 9mm round suppresses well in shorter barrels. Some indoor ranges don't allow rifle cartridges because of noise and safety issues. Shooting one is so much fun. And, then there's the low cost of ammo, especially if you reload.
Most of us would love to have a special weapon that no one else has ever touched. Unfortunately, when you get into the larger calibers, things get a little pricey. I want you to consider the lowly 9mm. It's a lot of fun to shoot. Additionally, the caliber can easily hold its own as a PDW. First, you need to get your hands on a good 9mm AR upper receiver. Sure, it seems like you can find a 9mm upper receiver on every website. Eventually, you get burned out reading endless reviews. All of them seem to blend together. However, if you're looking for perfection and reliability, look no further than an Odin Works 9mm AR upper receiver.
Odin Works brings their special touch to the 9mm upper receiver. They retain the classic look of an AR while achieving a unique appearance. One thing they did was to leave off the forward assist and go with a slick sided receiver. Odin Works starts with a billet of 7075 T6 aluminum and take away everything that doesn't look like an AR. Your little 9mm pistol or SBR has to be lean and mean. That's exactly the feel an Odin Works 9mm upper receiver brings to your build. Odin Works makes better shooters by building better products.