Summary: Welcome to Tactical Paradise!!! I’m your host Greg Bakken. In this podcast we’ll talk about all things tactical from everyday carry, to the mindset of armed citizens, real life situations and scenarios and the gear that will help you survive. This is episode 71. "Brownells Police Store helps make this show possible. The Police Store has your tactical needs covered including Law Enforcement, Self Defense, and Security. Please visit www.tacticalparadise.com/police" Happy Labor Day!! I still haven’t had a chance to shoot the pistol...I did pick up some sites for it though!! More great news in California!! Gear Guide: SIG SAUER® SB15 PISTOL STABILIZING BRACE Main Topic: Ammo Permits California lawmakers reject background checks for ammo buyers “The revised bill that failed Saturday would have required ammo sellers to provide information on purchasers to the state Department of Justice after the fact, including name, address, date of birth, date of the sale, brand type and amount.” BREAKING: CA Ammo Registration Bill Dead, “Gun Violence Restraining Order” on Governor’s Desk “California has always served as the canary in a coal mine when it came to the latest gun-control schemes floated by anti-gun forces, giving activists in other states a heads-up, helping us to prepare to fight these pernicious laws if and when they oozed eastward. Here’s hoping that CA is now filling a new, but similar role; allowing the crap laws to be passed far enough in advance of adoption in other states that they can be challenged and defeated in the courts by local 2nd amendment activists, before these defective laws spread like a resource-sucking liberty-killing zombie horde throughout the rest of the country. If so, hats off to the CA folks who are fighting the good fight, not only for themselves, but for the rest of us.” Hi again Greg! Great show as always. I recently built my own AR pistol and wanted to comment and some of the things you touched on in this weeks episode. Barrel length is really important. It's great that you went with the 11.5", because the 7.5" is really just a range toy. There are several problems with the shorter barrel. First of all, the 5.56 round was developed to work in a 20" barrel. Shortening the the barrel decreases velocity/lethality, bullet stability, and also the dwell time/length (affecting reliable cycling). Dwell time/length is the amount of time/length the round is in the barrel after it passes the gas port. The optimal dwell time is achieved in 7" of barrel length. This means that technically, if you want the best combination of velocity, bullet stabilization, and reliability then a 14.5" barrel is the best choice. Hence, the choice by our military to adopt the 14.5" barrel. That being said, I went with a 10.5" :) I felt it was a good compromise between performance and length. Looking at the chart (I researched more articles than just this one,but this one was laid out the best), you can see that anything below 9" is basically pointless. Although I suppose it depends on your intended use. If you want to blow out everyone's ear drums, singe their eyebrows, and blow the crap out of stuff at short range, then go for the 7.5. Here is a good read with images and charts on the subject: BARREL LENGTH STUDIES IN 5.56MM NATO WEAPONS Of course, changing the caliber of ammo introduces new variables. I went with a 300blk, which functions just as well in the aforementioned barrel lengths. However, if you switch to a pistol caliber, then I bet a shorter barrel wouldn't be as big of a deal (however I did not research that). You also spoke about the Sig arm brace and how yours would not seat against the back of the receiver. I believe this to be intentional by the manufacturer. There are several companies (KAK, UTG,etc) that now offer buffer tubes tailored to the SB-15 (KAK SUPER SIG SB-15 Pistol Buffer Tube). All of them have a stop which creates about a 3" gap between the brace and the receiver.
