Olympus
Member
- Joined
- Jul 14, 2008
- Messages
- 4,212
I have a spare lower that I need to turn into something. Keep in mind that my spare lower is a consecutive serial number to the lower I used for my AR rifle. Basically I'm wanting to have a nice pair of guns.
I'm thinking for my second lower, I'll build it into a pistol initially and put a Sig brace on it while I wait on a tax stamp to turn it into an SBR. There is no real purpose or intended use for the gun. It will be a fun gun, a truck gun, a SHTF grab-and-go gun. Basically a mate to my 556 rifle with the next serial number.
But I'm stumped on two parts, caliber and barrel length. My caliber choices are 556 like my other gun, 300BLK, or 7.62x39. My next problem is 7.5" or 10.5" barrel?
556 is the safe bet. Easy to get cheap ammo and my mags will interchange.
300BLK would be my first choice, but ammo is hard to find and really expensive. It doesn't lend itself to fun shooting. Reloading is an option, but even finding brass is impossible in my area.
7.62x39 would be even cheaper for ammo. Better ballistics from a shorter barrel. But you have to use those goofy looking bent mags and they won't interchange. And I also heard that 7.62x39 from a short barreled AR is not very fun to shoot due to recoil and concussion wave.
Then for barrel length I planned on using 7.5" because I wanted to be very short and easy to conceal in a bag of some kind. But people are saying 7.5" isn't long enough with 556 to be very effective and that 10.5" is necessary to get decent ballistics. Then others will say 10.5" is getting close to full rifle size and less like a "pistol/sbr". So I don't really know what to do about this either. Any advice would be helpful.
I'm thinking for my second lower, I'll build it into a pistol initially and put a Sig brace on it while I wait on a tax stamp to turn it into an SBR. There is no real purpose or intended use for the gun. It will be a fun gun, a truck gun, a SHTF grab-and-go gun. Basically a mate to my 556 rifle with the next serial number.
But I'm stumped on two parts, caliber and barrel length. My caliber choices are 556 like my other gun, 300BLK, or 7.62x39. My next problem is 7.5" or 10.5" barrel?
556 is the safe bet. Easy to get cheap ammo and my mags will interchange.
300BLK would be my first choice, but ammo is hard to find and really expensive. It doesn't lend itself to fun shooting. Reloading is an option, but even finding brass is impossible in my area.
7.62x39 would be even cheaper for ammo. Better ballistics from a shorter barrel. But you have to use those goofy looking bent mags and they won't interchange. And I also heard that 7.62x39 from a short barreled AR is not very fun to shoot due to recoil and concussion wave.
Then for barrel length I planned on using 7.5" because I wanted to be very short and easy to conceal in a bag of some kind. But people are saying 7.5" isn't long enough with 556 to be very effective and that 10.5" is necessary to get decent ballistics. Then others will say 10.5" is getting close to full rifle size and less like a "pistol/sbr". So I don't really know what to do about this either. Any advice would be helpful.