Posted on April 13th, 2015 by ar15news
Many of us are what our friends at Jerking The Trigger refer to as an “AR Pistolero”. Meaning we have one…or more…AR Pistols in our collection of Firearms. AR Pistols started gaining in popularity when Sig Sauer introduced the SB15 Arm Brace because everyone saw the “possibilities” that it represented. It wasn’t until the ATF gave us their approval (which has since been rescinded, not sure why we even asked for permission) to fire an AR Pistol equipped with an SB15 Arm Brace from the shoulder that their popularity shot through the roof. The SB15 was and still is pretty difficult to install, bulky, heavy and most of all, expensive. Recently KAK Industry secured the distribution rights to the new Shockwave Blade AR Pistol Stabilizer which addresses all of those issues many people had with the SB15. They have also produced a new AR Pistol Buffer Tube called the Shockwave that is designed to work flawlessly with the Blade. We’ve received a kit to try out so below you’ll see pictures of the install and a comparison between the SB15 and Blade kits.
THE KIT AND INSTALLATION
KAK Industry sells all of the new Shockwave components separately and as a Shockwave Package complete kit, which is what we received. The kit includes the new Shockwave AR Pistol Buffer Tube, Castle Nut, End Plate, Buffer, Buffer Spring, the Blade stabilizer and a copy of the Blade approval letter from the ATF.
Many AR Pistol buffer tubes just simply tighten down without the use of Castle Nut. The Shockwave Buffer Tube was designed to use any mil spec End Plate and a Castle Nut like your traditional AR. This gives you the most solid lockup and allows you to stake the castle nut in place.
As you can see in the picture below, the Shockwave AR Pistol Buffer Tube that KAK Industry designed was made with 12 dimples on the bottom (6 o’clock) of the tube. These dimples allow you to adjust the Blade stabilizer to any of the 12 spots and lock it in place using the set screw retention system.
To lock the Blade in place, find the desired length of pull, turn the AR Pistol upside down and line the set screw channel over the corresponding dimple on the buffer tube, insert the set screw and hand tighten. Once the set screw is in place, the Blade cannot slide forward or back and cannot spin on the tube like the SB15 has been known to do.
That’s really all there is to installing the KAK Shockwave Kit and Blade. As you can see it looks great on my 7.5″ 300BLK AR Pistol. I assumed there would be some play between the Blade stabilizer and the Shockwave buffer tube but with the use of the set screw there seriously is ZERO movement when I try to wiggle it or spin it. Its pretty impressive.
THE BLADE VS THE SB15
You’re probably like me and want to see how the Blade setup compares to an SB15 setup so I went ahead and did that for us.
WEIGHT: The Blade is made of a hard polymer like many AR accessories and is much lighter than the SB15. Combine that with the weight savings of using the new Shockwave Tube over using the popular Super Sig Tube and you’re over a half pound lighter already.
— KAK Shockwave Buffer Tube: 4.6 ounces
— Blade AR Pistol Stabilizer: 5 ounces
– Combined weight: 9.6 ounces
— KAK Super Sig Tube: 6.3 ounces
— SIG SB15 Arm Brace: 12.1 ounces
– Combined weight: 18.4 ounces
ADJUSTMENTS: The Sig SB15 can slide forward and back on a buffer tube but is not as solid the further back you position it. Many companies have tried to address that issue by making different buffer tubes that are longer like the Super Sig Tube (shown below). The Blade and Shockwave Tube however can be adjusted all the way forward towards the receiver for a super compact setup and adjusted all the way back to the last set screw position without compromising its solid lockup and all with the same buffer tube.
SIZE: As we mentioned earlier, the SB15 was always kind of bulky and awkward. The Blade is the exact opposite of that. It is not only light weight but it is compact. If you look at the pictures below you will see a good comparison and that SB15 is much wider than the Blade.
Overall, my initial impression of the KAK Shockwave Kit and Blade AR Stabilizer is very positive. As we all know, the recent ATF decision on how you are allowed to fire an AR Pistol has made some people less interested in building an AR Pistol. I can’t recommend shoulder firing an AR Pistol but I can recommend “There’s 1/8 of an inch between the stock and my shoulder” and “Don’t shoot with any ATF Agents”. While I totally agree that there’s nothing quite like owning an actual SBR, there are plenty of good reasons to own an AR Pistol other than to shoulder fire it such as transportation across state lines, carrying loaded in your vehicle in most states with your CCW, avoiding registration with the government as well some states do not allow you to own an SBR.
You probably think I forgot about one of the issues mentioned above with the Sig SB15 setup….the PRICE! As I already mentioned, KAK Industry sells these parts separately or as a kit. The KAK Shockwave Kit sells for just $95 which is less than you’ll pay for an SB15 brace by itself with no buffer tube kit. For more information or to purchase for yourself, head on over to www.KAKIndustry.com.